Setup eslint and enforce rules

src/util/logging/StandardLogger.ts

@@ -1,14 +1,14 @@
-import {Logger} from "./Logger";
-import {LogMessage} from "./types";
+import {Logger} from './Logger'
+import {LogMessage} from './types'
 import * as color from 'colors/safe'
 
 /**
  * A Logger implementation that writes to the console.
  */
 export class StandardLogger extends Logger {
-    public write(message: LogMessage) {
+    public write(message: LogMessage): void {
         const prefix = this.levelDisplay(message.level)
         const text = `${prefix} ${color.gray(this.formatDate(message.date))} (${color.cyan(message.callerName || 'Unknown')})`
-        console.log(text, message.output)
+        console.log(text, message.output)  // eslint-disable-line no-console
     }
 }