…ment

Port PR-4646 into release-1.6

… identifiers.

… external module declaration

Fix completion assert

…ngPattern

Fix emitted code for variable statement with no bound variables

Ports of PR-4703 into release 1.6

prerocess `export import` declarations correctly

Update version to 1.6.2

Fix command line crash with invalid '--moduleResolution' option

Change typescript.d.ts to be an external module instead of an ambient external module declaration

Port PR-4723 into release-1.6

Ports PR-4738 into release-1.6

Port PR 4749 into release-1.6

Conflicts:
	src/compiler/diagnosticInformationMap.generated.ts
	src/compiler/diagnosticMessages.json
	src/compiler/program.ts
	tests/baselines/reference/emptyObjectBindingPatternParameter04.symbols
	tests/baselines/reference/emptyObjectBindingPatternParameter04.types
	tests/baselines/reference/nodeResolution5.errors.txt
	tests/baselines/reference/nodeResolution7.errors.txt