fix(package.json): moved some dependencies to dev and added license field

Moved semantic release (with plugins) depedencies into dev. Added license field

fix #27

Author: epranka

package.json

@@ -7,18 +7,19 @@
     "chalk": "^3.0.0",
     "envinfo": "^7.4.0",
     "sao": "^1.7.0",
-    "semantic-release": "^15.13.31",
     "superb": "^4.0.0",
     "validate-npm-package-name": "^3.0.0",
+    "js-beautify": "^1.10.2"
+  },
+  "devDependencies": {
+    "semantic-release": "^15.13.31",
     "@semantic-release/changelog": "^3.0.6",
     "@semantic-release/commit-analyzer": "^6.3.3",
     "@semantic-release/git": "^7.0.18",
     "@semantic-release/npm": "^5.3.4",
     "@semantic-release/release-notes-generator": "^7.3.4",
-    "cz-conventional-changelog": "^3.0.2",
-    "js-beautify": "^1.10.2"
+    "cz-conventional-changelog": "^3.0.2"
   },
-  "devDependencies": {},
   "bin": "./cli.js",
   "scripts": {
     "test": "exit 0",
@@ -51,6 +52,7 @@
       "email": "epranka@gmail.com"
     }
   ],
+  "license": "ISC",
   "config": {
     "commitizen": {
       "path": "./node_modules/cz-conventional-changelog"