Bump uglify-js from 3.8.1 to 3.9.1

Bumps [uglify-js](https://github.com/mishoo/UglifyJS2) from 3.8.1 to 3.9.1.
- [Release notes](https://github.com/mishoo/UglifyJS2/releases)
- [Commits](https://github.com/mishoo/UglifyJS2/compare/v3.8.1...v3.9.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -4215,11 +4215,6 @@
 				"through": ">=2.2.7 <3"
 			}
 		},
-		"abab": {
-			"version": "2.0.3",
-			"resolved": "https://registry.npmjs.org/abab/-/abab-2.0.3.tgz",
-			"integrity": "sha512-tsFzPpcttalNjFBCFMqsKYQcWxxen1pgJR56by//QwvJc4/OUS3kPOOttx2tSIfjsylB0pYu7f5D3K1RCxUnUg=="
-		},
 		"abbrev": {
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 			"resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -8626,11 +8621,6 @@
 			"dev": true,
 			"optional": true
 		},
-		"filesize": {
-			"version": "6.1.0",
-			"resolved": "https://registry.npmjs.org/filesize/-/filesize-6.1.0.tgz",
-			"integrity": "sha512-LpCHtPQ3sFx67z+uh2HnSyWSLLu5Jxo21795uRDuar/EOuYWXib5EmPaGIBuSnRqH2IODiKA2k5re/K9OnN/Yg=="
-		},
 		"fill-range": {
 			"version": "4.0.0",
 			"resolved": "https://registry.npmjs.org/fill-range/-/fill-range-4.0.0.tgz",
@@ -8948,6 +8938,7 @@
 			"version": "8.1.0",
 			"resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
 			"integrity": "sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==",
+			"dev": true,
 			"requires": {
 				"graceful-fs": "^4.2.0",
 				"jsonfile": "^4.0.0",
@@ -8957,7 +8948,8 @@
 				"graceful-fs": {
 					"version": "4.2.4",
 					"resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
-					"integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
+					"integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==",
+					"dev": true
 				}
 			}
 		},
@@ -10306,7 +10298,8 @@
 		"graceful-fs": {
 			"version": "4.1.11",
 			"resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.11.tgz",
-			"integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg="
+			"integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg=",
+			"dev": true
 		},
 		"graphql": {
 			"version": "14.6.0",
@@ -10925,11 +10918,6 @@
 				"minimatch": "^3.0.4"
 			}
 		},
-		"immediate": {
-			"version": "3.0.6",
-			"resolved": "https://registry.npmjs.org/immediate/-/immediate-3.0.6.tgz",
-			"integrity": "sha1-nbHb0Pr43m++D13V5Wu2BigN5ps="
-		},
 		"import-cwd": {
 			"version": "2.1.0",
 			"resolved": "https://registry.npmjs.org/import-cwd/-/import-cwd-2.1.0.tgz",
@@ -11541,11 +11529,6 @@
 				}
 			}
 		},
-		"jed": {
-			"version": "1.1.1",
-			"resolved": "https://registry.npmjs.org/jed/-/jed-1.1.1.tgz",
-			"integrity": "sha1-elSbvZ/+FYWwzQoZHiAwVb7ldLQ="
-		},
 		"jest-docblock": {
 			"version": "25.3.0",
 			"resolved": "https://registry.npmjs.org/jest-docblock/-/jest-docblock-25.3.0.tgz",
@@ -11707,6 +11690,7 @@
 			"version": "4.0.0",
 			"resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
 			"integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+			"dev": true,
 			"requires": {
 				"graceful-fs": "^4.1.6"
 			}
@@ -12274,14 +12258,6 @@
 				"type-check": "~0.3.2"
 			}
 		},
-		"lie": {
-			"version": "3.1.1",
-			"resolved": "https://registry.npmjs.org/lie/-/lie-3.1.1.tgz",
-			"integrity": "sha1-mkNrLMd0bKWd56QfpGmz77dr2H4=",
-			"requires": {
-				"immediate": "~3.0.5"
-			}
-		},
 		"lines-and-columns": {
 			"version": "1.1.6",
 			"resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.1.6.tgz",
@@ -12356,14 +12332,6 @@
 				"json5": "^0.5.0"
 			}
 		},
-		"localforage": {
-			"version": "1.7.3",
-			"resolved": "https://registry.npmjs.org/localforage/-/localforage-1.7.3.tgz",
-			"integrity": "sha512-1TulyYfc4udS7ECSBT2vwJksWbkwwTX8BzeUIiq8Y07Riy7bDAAnxDaPU/tWyOVmQAcWJIEIFP9lPfBGqVoPgQ==",
-			"requires": {
-				"lie": "3.1.1"
-			}
-		},
 		"locate-path": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
@@ -12377,7 +12345,8 @@
 		"lodash": {
 			"version": "4.17.15",
 			"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-			"integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
+			"integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+			"dev": true
 		},
 		"lodash-template-webpack-loader": {
 			"version": "github:jcbrand/lodash-template-webpack-loader#258c095ab22130dfde454fa59ee0986f302bb733",
@@ -18634,14 +18603,6 @@
 				}
 			}
 		},
-		"pluggable.js": {
-			"version": "2.0.1",
-			"resolved": "https://registry.npmjs.org/pluggable.js/-/pluggable.js-2.0.1.tgz",
-			"integrity": "sha512-SBt6v6Tbp20Jf8hU0cpcc/+HBHGMY8/Q+yA6Ih0tBQE8tfdZ6U4PRG0iNvUUjLx/hVyOP53n0UfGBymlfaaXCg==",
-			"requires": {
-				"lodash": "^4.17.11"
-			}
-		},
 		"po-loader": {
 			"version": "0.5.0",
 			"resolved": "https://registry.npmjs.org/po-loader/-/po-loader-0.5.0.tgz",
@@ -20790,13 +20751,6 @@
 			"integrity": "sha512-mncpQHS12IwzOpuMReKd2matojaS5M5Ofms96LUKOOg8S1M7jIh90OQyd2I6sBoHpxg/HoduOJNDTvRCmnm0YA==",
 			"dev": true
 		},
-		"skeletor.js": {
-			"version": "github:skeletorjs/skeletor#bf6d9c86f9fcf224fa9d9af5a25380b77aa4b561",
-			"from": "github:skeletorjs/skeletor#bf6d9c86f9fcf224fa9d9af5a25380b77aa4b561",
-			"requires": {
-				"lodash": "^4.17.14"
-			}
-		},
 		"slash": {
 			"version": "2.0.0",
 			"resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
@@ -21638,24 +21592,6 @@
 				"through": "^2.3.4"
 			}
 		},
-		"strophe.js": {
-			"version": "1.3.5",
-			"resolved": "https://registry.npmjs.org/strophe.js/-/strophe.js-1.3.5.tgz",
-			"integrity": "sha512-258PeC2FieDMBtewJLXwmgtXmG2AI8eRJJnfOV1geUeQJui2nrRzu2feclG53PDbvUZrSP0eWcPAnraPuHjRAQ==",
-			"requires": {
-				"abab": "^2.0.0",
-				"ws": "^7.0.0",
-				"xmldom": "^0.1.27"
-			},
-			"dependencies": {
-				"ws": {
-					"version": "7.3.0",
-					"resolved": "https://registry.npmjs.org/ws/-/ws-7.3.0.tgz",
-					"integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w==",
-					"optional": true
-				}
-			}
-		},
 		"style-loader": {
 			"version": "0.23.1",
 			"resolved": "https://registry.npmjs.org/style-loader/-/style-loader-0.23.1.tgz",
@@ -22089,33 +22025,6 @@
 			"integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
 			"dev": true
 		},
-		"twemoji": {
-			"version": "12.1.6",
-			"resolved": "https://registry.npmjs.org/twemoji/-/twemoji-12.1.6.tgz",
-			"integrity": "sha512-FIKi9Jne5IiDGDWekoANJ1a8ltUKVbJLEIR8XUpbFRDMqIPgLWnYgjeWZ1KOrdiTztRCAa9x4v+5w5OuiJOGVw==",
-			"requires": {
-				"fs-extra": "^8.0.1",
-				"jsonfile": "^5.0.0",
-				"twemoji-parser": "12.1.3",
-				"universalify": "^0.1.2"
-			},
-			"dependencies": {
-				"jsonfile": {
-					"version": "5.0.0",
-					"resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-5.0.0.tgz",
-					"integrity": "sha512-NQRZ5CRo74MhMMC3/3r5g2k4fjodJ/wh8MxjFbCViWKFjxrnudWSY5vomh+23ZaXzAS7J3fBZIR2dV6WbmfM0w==",
-					"requires": {
-						"graceful-fs": "^4.1.6",
-						"universalify": "^0.1.2"
-					}
-				}
-			}
-		},
-		"twemoji-parser": {
-			"version": "12.1.3",
-			"resolved": "https://registry.npmjs.org/twemoji-parser/-/twemoji-parser-12.1.3.tgz",
-			"integrity": "sha512-ND4LZXF4X92/PFrzSgGkq6KPPg8swy/U0yRw1k/+izWRVmq1HYi3khPwV3XIB6FRudgVICAaBhJfW8e8G3HC7Q=="
-		},
 		"type-check": {
 			"version": "0.3.2",
 			"resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -22166,29 +22075,19 @@
 			"dev": true
 		},
 		"uglify-js": {
-			"version": "3.8.1",
-			"resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.8.1.tgz",
-			"integrity": "sha512-W7KxyzeaQmZvUFbGj4+YFshhVrMBGSg2IbcYAjGWGvx8DHvJMclbTDMpffdxFUGPBHjIytk7KJUR/KUXstUGDw==",
+			"version": "3.9.2",
+			"resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.9.2.tgz",
+			"integrity": "sha512-zGVwKslUAD/EeqOrD1nQaBmXIHl1Vw371we8cvS8I6mYK9rmgX5tv8AAeJdfsQ3Kk5mGax2SVV/AizxdNGhl7Q==",
 			"dev": true,
-			"optional": true,
 			"requires": {
-				"commander": "~2.20.3",
-				"source-map": "~0.6.1"
+				"commander": "~2.20.3"
 			},
 			"dependencies": {
 				"commander": {
 					"version": "2.20.3",
 					"resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
 					"integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
-					"dev": true,
-					"optional": true
-				},
-				"source-map": {
-					"version": "0.6.1",
-					"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-					"integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-					"dev": true,
-					"optional": true
+					"dev": true
 				}
 			}
 		},
@@ -22400,7 +22299,8 @@
 		"universalify": {
 			"version": "0.1.2",
 			"resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
-			"integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+			"integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+			"dev": true
 		},
 		"unpipe": {
 			"version": "1.0.0",
@@ -23405,12 +23305,6 @@
 			"integrity": "sha512-HgS+X6zAztGa9zIK3Y3LXuJes33Lz9x+YyTxgrkIdabu2vqcGOWwdfCpf1hWLRrd553wd4QCDf6BBO6FfdsRiQ==",
 			"dev": true
 		},
-		"xmldom": {
-			"version": "0.1.31",
-			"resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.1.31.tgz",
-			"integrity": "sha512-yS2uJflVQs6n+CyjHoaBmVSqIDevTAWrzMmjG1Gc7h1qQ7uVozNhEPJAwZXWyGQ/Gafo3fCwrcaokezLPupVyQ==",
-			"optional": true
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 		"xmlhttprequest-ssl": {
 			"version": "1.5.5",
 			"resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",