fix(karma): Always initilize reporter adapters

Intelij's plugin is using karma multi reporter which expects adaper array of each reporter to be initialized. Moving adaper array initialization before the isKarmaConfigAppropriate check in order to satisfy that contract.

re #254

src/reporter.ts

@@ -25,12 +25,12 @@ export const sabarivkaReporter: KarmaReporter = Object.defineProperty(
     karmaConfig: KarmaOptions,
     logger: Logger
   ): void {
+    this.adapters = [];
     if (!isKarmaConfigAppropriate(karmaConfig, logger)) {
       return;
-    }
 
+    }
     this.onBrowserComplete = getFileInstrumenterFn(karmaConfig);
-    this.adapters = [];
   },
   '$inject',
   {