feat: use eslint with prettier to format code

client/plugins/fcc-source-challenges/gatsby-node.js

@@ -31,28 +31,26 @@ exports.sourceNodes = function sourceChallengesSourceNodes(
     persistent: true
   });
 
-  watcher.on('ready', sourceAndCreateNodes).on(
-    'change',
-    filePath =>
-      (/\.md$/).test(filePath)
-        ? onSourceChange(filePath)
-            .then(challenge => {
-              reporter.info(
-                `File changed at ${filePath}, replacing challengeNode id ${
-                  challenge.id
-                }`
-              );
-              return createChallengeNode(challenge, reporter);
-            })
-            .then(createNode)
-            .catch(e =>
-              reporter.error(`fcc-replace-challenge
+  watcher.on('ready', sourceAndCreateNodes).on('change', filePath =>
+    /\.md$/.test(filePath)
+      ? onSourceChange(filePath)
+          .then(challenge => {
+            reporter.info(
+              `File changed at ${filePath}, replacing challengeNode id ${
+                challenge.id
+              }`
+            );
+            return createChallengeNode(challenge, reporter);
+          })
+          .then(createNode)
+          .catch(e =>
+            reporter.error(`fcc-replace-challenge
 
   ${e.message}
 
   `)
-            )
-        : null
+          )
+      : null
   );
 
   function sourceAndCreateNodes() {