fix: make it work with percentages, closes #1

Fixes #1 

Also need to update CI because mocha doesn't run on oldnode anymore 😄

Author: tswaters

.travis.yml

@@ -1,6 +1,5 @@
 sudo: false
 language: node_js
 node_js:
-  - 'iojs'
-  - '0.12'
-  - '0.10'
+  - '6'
+  - '8'

index.js

@@ -4,6 +4,6 @@ module.exports = function rgbaRegex(options) {
   options = options || {};
 
   return options.exact ?
-    /^rgba\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3}),\s*(\d*(?:\.\d+)?)\)$/ :
-    /rgba\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3}),\s*(\d*(?:\.\d+)?)\)/ig;
+    /^rgba\((\d{1,3}%?),\s*(\d{1,3}%?),\s*(\d{1,3}%?),\s*(\d*(?:\.\d+)?)\)$/ :
+    /rgba\((\d{1,3}%?),\s*(\d{1,3}%?),\s*(\d{1,3}%?),\s*(\d*(?:\.\d+)?)\)/ig;
 }

test/test.js

@@ -2,13 +2,15 @@ var assert = require('assert');
 var rgbaRegex = require('..');
 
 var rgbaStrings = [
+  'rgba(50%, 50%, 50%, 1)',
   'rgba(12,34,56, 1)',
   'rgba(255, 255,      255, .9)',
   'rgba(1,   1,1, 0.2)'
 ];
 
 var inexactRgbaStrings = [
   'rgba(,,,)',
+  'rgba(%, %, %, 1)',
   'rGba(12,34,56,1)',
   'rgba(12, 34, 200,1) ',
   '   rgba(12,34,56,1)',