bumping package versions

package.json

@@ -20,15 +20,15 @@
   "author": "Bryan Donovan",
   "license": "MIT",
   "dependencies": {
-    "async": ">=0.1.22",
+    "async": "^0.9.0",
-    "lru-cache": ">=2.3.0"
+    "lru-cache": "^2.5.0"
   },
   "devDependencies": {
-    "coveralls": "~2.3.0",
+    "coveralls": "^2.3.0",
-    "istanbul": ">=0.1.29",
+    "istanbul": "^0.2.11",
-    "jshint": ">=1.0.1",
+    "jshint": "^2.5.1",
-    "mocha": ">=1.8.1",
+    "mocha": "^1.20.1",
-    "optimist": ">=0.3.5",
+    "optimist": "^0.6.1",
-    "sinon": ">=1.5.2"
+    "sinon": "^1.10.2"
   }
 }