deps: pin dev-deps to fix ci bugs (mainly a sinon.js issue)

Author: shakyShane

package.json

@@ -58,26 +58,26 @@
     "ucfirst": "0.0.1"
   },
   "devDependencies": {
-    "browser-sync-spa": "^1.0.2",
-    "bs-snippet-injector": "^2.0.1",
-    "chai": "^3.2.0",
-    "chalk": "^1.1.0",
-    "eslint": "^1.1.0",
-    "graceful-fs": "^3.0.8",
-    "gulp": "^3.9.0",
+    "browser-sync-spa": "1.0.2",
+    "bs-snippet-injector": "2.0.1",
+    "chai": "3.2.0",
+    "chalk": "1.1.1",
+    "eslint": "1.3.1",
+    "graceful-fs": "3.0.8",
+    "gulp": "3.9.0",
     "gulp-contribs": "0.0.3",
-    "gulp-conventional-changelog": "^0.4.0",
-    "gulp-filter": "^2.0.2",
-    "istanbul": "^0.3.17",
-    "istanbul-coveralls": "^1.0.3",
-    "mocha": "^2.2.5",
-    "q": "^1.4.1",
-    "request": "^2.60.0",
-    "sinon": "^1.15.4",
-    "slugify": "^0.1.1",
-    "socket.io-client": "^1.3.6",
-    "supertest": "^1.0.1",
-    "vinyl": "^0.5.0"
+    "gulp-conventional-changelog": "0.4.0",
+    "gulp-filter": "2.0.2",
+    "istanbul": "0.3.19",
+    "istanbul-coveralls": "1.0.3",
+    "mocha": "2.3.0",
+    "q": "1.4.1",
+    "request": "2.61.0",
+    "sinon": "1.15.4",
+    "slugify": "0.1.1",
+    "socket.io-client": "1.3.6",
+    "supertest": "1.1.0",
+    "vinyl": "0.5.3"
   },
   "keywords": [
     "browser sync",