Use Prettier JS (#5017)

* Adds prettier

* Run lint before tests

spec/NullCacheAdapter.spec.js

@@ -1,12 +1,13 @@
-const NullCacheAdapter = require('../lib/Adapters/Cache/NullCacheAdapter').default;
+const NullCacheAdapter = require('../lib/Adapters/Cache/NullCacheAdapter')
+  .default;
 
 describe('NullCacheAdapter', function() {
   const KEY = 'hello';
   const VALUE = 'world';
 
-  it('should expose promisifyed methods', (done) => {
+  it('should expose promisifyed methods', done => {
     const cache = new NullCacheAdapter({
-      ttl: NaN
+      ttl: NaN,
     });
 
     // Verify all methods return promises.
@@ -14,24 +15,24 @@ describe('NullCacheAdapter', function() {
       cache.put(KEY, VALUE),
       cache.del(KEY),
       cache.get(KEY),
-      cache.clear()
+      cache.clear(),
     ]).then(() => {
       done();
     });
   });
 
-  it('should get/set/clear', (done) => {
+  it('should get/set/clear', done => {
     const cache = new NullCacheAdapter({
-      ttl: NaN
+      ttl: NaN,
     });
 
-    cache.put(KEY, VALUE)
+    cache
+      .put(KEY, VALUE)
       .then(() => cache.get(KEY))
-      .then((value) => expect(value).toEqual(null))
+      .then(value => expect(value).toEqual(null))
       .then(() => cache.clear())
       .then(() => cache.get(KEY))
-      .then((value) => expect(value).toEqual(null))
+      .then(value => expect(value).toEqual(null))
       .then(done);
   });
-
 });