fix(package): move @types to devDependencies

fixes: easy-webpack/core#21

Author: niieani

package.json

@@ -32,8 +32,10 @@
   "devDependencies": {
     "@easy-webpack/core": "*",
     "@types/debug": "0.0.29",
-    "@types/lodash": "4.14.37",
+    "@types/lodash": "^4.14.38",
     "@types/node": "^6.0.46",
+    "@types/source-map": "^0.1.29",
+    "@types/webpack": "^1.12.35",
     "ava": "^0.16.0",
     "cross-env": "^3.1.3",
     "greenkeeper-postpublish": "^1.0.1",
@@ -44,14 +46,7 @@
     "tslint-config-standard": "^1.5.0",
     "typescript": "^2.1.0-dev.20160720 || ^2.1.0"
   },
-  "dependencies": {
-    "@types/debug": "^0.0.29",
-    "@types/lodash": "^4.14.37",
-    "@types/node": "^6.0.46",
-    "@types/source-map": "^0.1.28",
-    "@types/uglify-js": "^2.6.28",
-    "@types/webpack": "^1.12.35"
-  },
+  "dependencies": {},
   "peerDependencies": {
     "@easy-webpack/core": "*"
   },