Fix code style

Author: adamwathan

__tests__/plugins/textColor.test.js

@@ -54,10 +54,10 @@ test('colors can be a nested object', () => {
     {
       utilities: {
         '.text-purple': { color: 'purple' },
-        '.text-white-25': { 'color': 'rgba(255,255,255,.25)' },
-        '.text-white-50': { 'color': 'rgba(255,255,255,.5)' },
-        '.text-white-75': { 'color': 'rgba(255,255,255,.75)' },
-        '.text-white': { 'color': '#fff' },
+        '.text-white-25': { color: 'rgba(255,255,255,.25)' },
+        '.text-white-50': { color: 'rgba(255,255,255,.5)' },
+        '.text-white-75': { color: 'rgba(255,255,255,.75)' },
+        '.text-white': { color: '#fff' },
         '.text-red-1': { color: 'rgb(33,0,0)' },
         '.text-red-2': { color: 'rgb(67,0,0)' },
         '.text-red-3': { color: 'rgb(100,0,0)' },