Add asserts, bigint, and unknown to TypeScript keywords

Also, while I'm in here, consolidate typeKeywords into keywords in order to make it easier to keep this in sync with TypeScript going forward. I'm assuming that typeKeywords is not part of Monaco's public API that third-party integrations are supposed to depend on; if it is, then I can undo this.

Fixes: microsoft/monaco-editor#1978

src/typescript/typescript.ts

@@ -73,19 +73,17 @@ export const language = {
 	tokenPostfix: '.ts',
 
 	keywords: [
-		'abstract', 'as', 'break', 'case', 'catch', 'class', 'continue', 'const',
-		'constructor', 'debugger', 'declare', 'default', 'delete', 'do', 'else',
-		'enum', 'export', 'extends', 'false', 'finally', 'for', 'from', 'function',
-		'get', 'if', 'implements', 'import', 'in', 'infer', 'instanceof', 'interface',
-		'is', 'keyof', 'let', 'module', 'namespace', 'never', 'new', 'null', 'package',
-		'private', 'protected', 'public', 'readonly', 'require', 'global', 'return',
-		'set', 'static', 'super', 'switch', 'symbol', 'this', 'throw', 'true', 'try',
-		'type', 'typeof', 'unique', 'var', 'void', 'while', 'with', 'yield', 'async',
-		'await', 'of'
-	],
-
-	typeKeywords: [
-		'any', 'boolean', 'number', 'object', 'string', 'undefined'
+		// Should match the keys of textToKeywordObj in
+		// https://github.com/microsoft/TypeScript/blob/master/src/compiler/scanner.ts
+		'abstract', 'any', 'as', 'asserts', 'bigint', 'boolean', 'break', 'case', 'catch',
+		'class', 'continue', 'const', 'constructor', 'debugger', 'declare', 'default',
+		'delete', 'do', 'else', 'enum', 'export', 'extends', 'false', 'finally', 'for',
+		'from', 'function', 'get', 'if', 'implements', 'import', 'in', 'infer',
+		'instanceof', 'interface', 'is', 'keyof', 'let', 'module', 'namespace', 'never',
+		'new', 'null', 'number', 'object', 'package', 'private', 'protected', 'public',
+		'readonly', 'require', 'global', 'return', 'set', 'static', 'string', 'super',
+		'switch', 'symbol', 'this', 'throw', 'true', 'try', 'type', 'typeof', 'undefined',
+		'unique', 'unknown', 'var', 'void', 'while', 'with', 'yield', 'async', 'await', 'of'
 	],
 
 	operators: [
@@ -118,7 +116,6 @@ export const language = {
 			// identifiers and keywords
 			[/[a-z_$][\w$]*/, {
 				cases: {
-					'@typeKeywords': 'keyword',
 					'@keywords': 'keyword',
 					'@default': 'identifier'
 				}