Merge branch 'master' into migrateMapsAndSets

# Conflicts:
#	src/compiler/checker.ts
#	src/compiler/commandLineParser.ts
#	src/compiler/core.ts
#	src/compiler/moduleNameResolver.ts
#	src/compiler/transformers/declarations.ts
#	src/compiler/tsbuildPublic.ts
#	src/compiler/types.ts
#	src/compiler/utilities.ts
#	src/harness/client.ts
#	src/server/editorServices.ts
#	src/server/typingsCache.ts
#	src/server/utilities.ts
#	src/services/codefixes/convertToAsyncFunction.ts
#	src/services/documentRegistry.ts
#	src/services/importTracker.ts
#	src/services/refactorProvider.ts
#	src/services/refactors/extractSymbol.ts
#	src/testRunner/unittests/programApi.ts
#	src/typingsInstallerCore/typingsInstaller.ts
#	tests/baselines/reference/api/tsserverlibrary.d.ts
#	tests/baselines/reference/api/typescript.d.ts

src/tsserver/server.ts

@@ -233,7 +233,7 @@ namespace ts.server {
         private requestMap = new Map<string, QueuedOperation>(); // Maps operation ID to newest requestQueue entry with that ID
         /** We will lazily request the types registry on the first call to `isKnownTypesPackageName` and store it in `typesRegistryCache`. */
         private requestedRegistry = false;
-        private typesRegistryCache: Map<string, MapLike<string>> | undefined;
+        private typesRegistryCache: ESMap<string, MapLike<string>> | undefined;
 
         // This number is essentially arbitrary.  Processing more than one typings request
         // at a time makes sense, but having too many in the pipe results in a hang