Correct rev for pluggable.js.

Don't include muc-embedded by default

package.json

@@ -59,7 +59,7 @@
     "otr": "0.2.16",
     "phantom-jasmine": "0.1.8",
     "phantomjs": "~1.9.7-1",
-    "pluggable.js": "https://github.com/jcbrand/pluggable.js.git#078e8898b26954d0744f3e41b894b870675f17e7",
+    "pluggable.js": "https://github.com/jcbrand/pluggable.js.git#be5b7cb7ff574f2a4df24db125250dda1e7e1891",
     "po2json": "^0.4.4",
     "requirejs": "2.3.2",
     "snyk": "^1.21.2",

src/converse-core.js

@@ -58,7 +58,6 @@
         'converse-mam',
         'converse-minimize',
         'converse-muc',
-        'converse-muc-embedded',
         'converse-notification',
         'converse-otr',
         'converse-ping',