Add xhr support for render file in browser.

package.json

@@ -17,7 +17,9 @@
     "type": "git",
     "url": "git+https://github.com/harttle/liquidjs.git"
   },
-  "engines": { "node" : ">=4.8.7" },
+  "engines": {
+    "node": ">=4.8.7"
+  },
   "keywords": [
     "liquid",
     "template engine",
@@ -32,14 +34,15 @@
   },
   "homepage": "https://github.com/harttle/liquidjs#readme",
   "dependencies": {
-    "any-promise": "^1.3.0"
+    "any-promise": "^1.3.0",
+    "resolve-url": "^0.2.1"
   },
   "browser": {
     "fs": false
   },
   "devDependencies": {
-    "babel-preset-es2015": "^6.24.1",
     "babel-core": "^6.26.0",
+    "babel-preset-es2015": "^6.24.1",
     "babelify": "^8.0.0",
     "browserify": "^14.4.0",
     "chai": "^4.1.2",
@@ -54,6 +57,7 @@
     "eslint-plugin-standard": "^3.0.1",
     "express": "^4.16.1",
     "istanbul": "^0.4.5",
+    "jsdom": "^11.5.1",
     "mocha": "^4.0.0",
     "mock-fs": "^4.4.1",
     "sinon": "^4.0.1",