Support tsconfig typeRoots (#1028)

Author: seanchas116

dist/main/tsconfig/tsconfig.js

@@ -62,6 +62,7 @@ var compilerOptionsValidation = {
     suppressExcessPropertyErrors: { type: types.boolean },
     suppressImplicitAnyIndexErrors: { type: types.boolean },
     target: { type: types.string, validValues: ['es3', 'es5', 'es6', 'es2015'] },
+    typeRoots: { type: types.array },
     types: { type: types.object },
     version: { type: types.boolean },
     watch: { type: types.boolean },

lib/main/tsconfig/tsconfig.ts

@@ -74,6 +74,7 @@ interface CompilerOptions {
     suppressExcessPropertyErrors?: boolean;           // Optionally disable strict object literal assignment checking
     suppressImplicitAnyIndexErrors?: boolean;
     target?: string;                                  // 'es3'|'es5' (default)|'es6'|'es2015'
+    typeRoots?: string[];
     types?: string[];
     version?: boolean;
     watch?: boolean;
@@ -140,6 +141,7 @@ var compilerOptionsValidation: simpleValidator.ValidationInfo = {
     suppressExcessPropertyErrors: { type: types.boolean },
     suppressImplicitAnyIndexErrors: { type: types.boolean },
     target: { type: types.string, validValues: ['es3', 'es5', 'es6', 'es2015'] },
+    typeRoots: { type: types.array },
     types: { type: types.object },
     version: { type: types.boolean },
     watch: { type: types.boolean },