fix(package): update throat to version 4.0.0 (#187)

Author: greenkeeper[bot]

package.json

@@ -69,7 +69,7 @@
     "string-template": "^1.0.0",
     "strip-bom": "^3.0.0",
     "thenify": "^3.1.0",
-    "throat": "^3.0.0",
+    "throat": "^4.0.0",
     "touch": "^1.0.0",
     "typescript": "^2.1.4",
     "xtend": "^4.0.0",