build(package.json): Update dependencies

Updated "proxyquire", "raml-parser", and "request" dependencies. These are done blind; I wait for
Travis to confirm Node-4.x support, backing down if necessary. Also bumped the package version and
added `directories` section.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "abao",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "description": "RAML testing tool",
   "bin": "bin/abao",
   "main": "lib/index.js",
@@ -39,6 +39,10 @@
     "url": "https://github.com/cybertk/abao/issues/"
   },
   "homepage": "https://github.com/cybertk/abao/",
+  "directories": {
+    "lib": "./lib",
+    "test": "./test"
+  },
   "dependencies": {
     "async": "^2.0.1",
     "chai": "~3.5.0",
@@ -49,9 +53,9 @@
     "lodash": "^4.16.4",
     "mocha": "~3.4.2",
     "mustache": "~2.3.0",
-    "proxyquire": "^1.3.1",
-    "raml-parser": "^0.8.16",
-    "request": "^2.53.0",
+    "proxyquire": "^2.0.0",
+    "raml-parser": "^0.8.18",
+    "request": "^2.85.0",
     "source-map-support": "^0.4.0",
     "tv4": "^1.2.7",
     "underscore": "^1.8.2",