Fix linting

Author: Mark1626

e2e/transform/transform-runner/runner.ts

@@ -38,30 +38,32 @@ export default class BaseTestRunner {
       (promise, test) =>
         mutex(() =>
           promise
-            .then(async () : Promise<TestResult> => {
-              await onStart(test);
-              return {
-                ...createEmptyTestResult(),
-                numPassingTests: 1,
-                testFilePath: test.path,
-                testResults: [
-                  {
-                    ancestorTitles: [],
-                    duration: 2,
-                    failureMessages: [],
-                    fullName: 'sample test',
-                    location: null,
-                    numPassingAsserts: 1,
-                    status: 'passed',
-                    title: 'sample test',
-                  },
-                ],
-              };
-            })
+            .then(
+              async (): Promise<TestResult> => {
+                await onStart(test);
+                return {
+                  ...createEmptyTestResult(),
+                  numPassingTests: 1,
+                  testFilePath: test.path,
+                  testResults: [
+                    {
+                      ancestorTitles: [],
+                      duration: 2,
+                      failureMessages: [],
+                      fullName: 'sample test',
+                      location: null,
+                      numPassingAsserts: 1,
+                      status: 'passed',
+                      title: 'sample test',
+                    },
+                  ],
+                };
+              }
+            )
             .then(result => onResult(test, result))
             .catch(err => onFailure(test, err))
         ),
       Promise.resolve()
     );
   }
-}
+}