chore(build): add tslint and unit tests to prerelease gulp task

closes #5755

ionic/components/img/img.ts

@@ -84,7 +84,7 @@ export class Img {
   }
 
   private _loaded(isLoaded: boolean) {
-    this._elementRef.nativeElement.classList[isLoaded ? 'add': 'remove']('img-loaded');
+    this._elementRef.nativeElement.classList[isLoaded ? 'add' : 'remove']('img-loaded');
   }
 
   enable(shouldEnable: boolean) {

ionic/platform/platform.ts

@@ -190,7 +190,7 @@ export class Platform {
   triggerReady() {
     this._zone.run(() => {
       this._readyResolve();
-    })
+    });
   }
 
   /**
@@ -741,5 +741,5 @@ export interface PlatformVersion {
   str?: string;
   num?: number;
   major?: number;
-  minor?: number
+  minor?: number;
 }