Fix types of reporters runner hooks

packages/wdio-reporter/reporter.d.ts

@@ -5,7 +5,7 @@ declare namespace WDIOReporter {
     class Reporter {
         constructor (options: Options);
 
-        onRunnerStart(): void;
+        onRunnerStart(runner: any): void;
         onBeforeCommand(command: BeforeCommand): void;
         onAfterCommand(command: AfterCommand): void;
         onScreenshot(): void;
@@ -18,7 +18,7 @@ declare namespace WDIOReporter {
         onTestSkip(test: Test): void;
         onTestEnd(test: Test): void;
         onSuiteEnd(suite: Suite): void;
-        onRunnerEnd(): void;
+        onRunnerEnd(runner: any): void;
 
         isSynchronised: boolean;
 

tests/typings/webdriverio-reporter/reporter.ts

@@ -60,6 +60,14 @@ class CustomReporter extends WDIOReporter {
     constructor(options: WDIOReporter.Options) {
         super(options)
     }
+
+    onRunnerStart(runner: any) {
+      // Do things
+    }
+
+    onRunnerEnd(runner: any) {
+      // Do things
+    }
 }
 
 export default {}