add strict mdoe directive to all nones6 module emits

Author: weswigham

src/compiler/emitter.ts

@@ -7383,6 +7383,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
  write(`], function(${exportFunctionForFile}) {`);
  writeLine();
  increaseIndent();
+ emitUseStrictPrologueDirective();
  const startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true);
  emitEmitHelpers(node);
  emitCaptureThisForNodeIfNecessary(node);
@@ -7493,6 +7494,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
  writeModuleName(node, emitRelativePathAsModuleName);
  emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName);
  increaseIndent();
+ emitUseStrictPrologueDirective();
  const startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true);
  emitExportStarHelper();
  emitCaptureThisForNodeIfNecessary(node);
@@ -7505,6 +7507,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
  }
 
  function emitCommonJSModule(node: SourceFile) {
+ emitUseStrictPrologueDirective();
  const startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
  emitEmitHelpers(node);
  collectExternalModuleInfo(node);
@@ -7515,6 +7518,11 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
  emitExportEquals(/*emitAsReturn*/ false);
  }
 
+ function emitUseStrictPrologueDirective() {
+ writeLine();
+ write("\"use strict\";");
+ }
+
  function emitUMDModule(node: SourceFile) {
  emitEmitHelpers(node);
  collectExternalModuleInfo(node);
@@ -7534,6 +7542,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
 })(`);
  emitAMDFactoryHeader(dependencyNames);
  increaseIndent();
+ emitUseStrictPrologueDirective();
  const startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true);
  emitExportStarHelper();
  emitCaptureThisForNodeIfNecessary(node);