add prettier and eslint

spec/helpers/checkForMap.js

@@ -1,37 +1,46 @@
 (function(env) {
   function hasFunctioningMaps() {
-    if (typeof Map === 'undefined') { return false; }
+    if (typeof Map === 'undefined') {
+      return false;
+    }
 
     try {
       var s = new Map();
-      s.set('a',1);
-      s.set('b',2);
+      s.set('a', 1);
+      s.set('b', 2);
 
-      if (s.size !== 2) { return false; }
-      if (s.has('a') !== true) { return false; }
+      if (s.size !== 2) {
+        return false;
+      }
+      if (s.has('a') !== true) {
+        return false;
+      }
 
       var iterations = 0;
       var ifForEachWorking = true;
       s.forEach(function(value, key, map) {
         ifForEachWorking = ifForEachWorking && map === s;
-        if (key==='a') {
-          ifForEachWorking = ifForEachWorking && value===1;
+        if (key === 'a') {
+          ifForEachWorking = ifForEachWorking && value === 1;
         }
         iterations++;
       });
-      if (iterations !== 2) { return false; }
-      if (ifForEachWorking !== true) { return false; }
+      if (iterations !== 2) {
+        return false;
+      }
+      if (ifForEachWorking !== true) {
+        return false;
+      }
 
       return true;
-    } catch(e) {
+    } catch (e) {
       return false;
     }
   }
 
   env.requireFunctioningMaps = function() {
     if (!hasFunctioningMaps()) {
-      env.pending("Browser has incomplete or missing support for Maps");
+      env.pending('Browser has incomplete or missing support for Maps');
     }
   };
-
 })(jasmine.getEnv());