Don’t throw on error if user allows emit on error.

Author: chriskrycho

index.js

@@ -1,5 +1,4 @@
 /* eslint-env node */
-const path = require('path');
 
 let TsPreprocessor;
 try {

lib/typescript-preprocessor.js

@@ -42,7 +42,7 @@ class TypeScriptPreprocessor {
 
     const ts = debugTree(
       tsc(uncompiledTs, {
-        throwOnError: true,
+        throwOnError: !this.config.compilerOptions.noEmitOnError,
         annotation: 'Compiled TS files',
         include: ['**/*'],
         tsconfig: this.config,