apply prettier formatting

.prettierrc

@@ -3,5 +3,5 @@
   "tabWidth": 2,
   "printWidth": 120,
   "singleQuote": false,
-  "trailingComma": "es5"
+  "trailingComma": "none"
 }

src/utils/ErrorMapper.ts

@@ -1,5 +1,5 @@
 // tslint:disable:no-conditional-assignment
-import {SourceMapConsumer} from "source-map";
+import { SourceMapConsumer } from "source-map";
 
 export class ErrorMapper {
   // Cache consumer
@@ -26,7 +26,7 @@ export class ErrorMapper {
    * @returns {string} The source-mapped stack trace
    */
   public static sourceMappedStackTrace(error: Error | string): string {
-    const stack: string = error instanceof Error ? error.stack as string : error;
+    const stack: string = error instanceof Error ? (error.stack as string) : error;
     if (this.cache.hasOwnProperty(stack)) {
       return this.cache[stack];
     }
@@ -35,7 +35,7 @@ export class ErrorMapper {
     let match: RegExpExecArray | null;
     let outStack = error.toString();
 
-    while (match = re.exec(stack)) {
+    while ((match = re.exec(stack))) {
       if (match[2] === "main") {
         const pos = this.consumer.originalPositionFor({
           column: parseInt(match[4], 10),