fix: semantic release

Update semantic-release to the latest version and update script.

BREAKING CHANGE: Moves model class from `context` prop directly to a `context.model` prop, which prevents issues when merging context objects. (This was actually committed in #12)

Author: jlengstorf

package.json

@@ -27,7 +27,7 @@
     "lint": "eslint src/",
     "test:unit": "NODE_ENV=test jest --coverage",
     "test": "npm run lint --silent && npm run test:unit --silent",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post"
+    "semantic-release": "semantic-release"
   },
   "keywords": [
     "graphql"
@@ -66,7 +66,7 @@
     "jest": "^22.0.6",
     "nodemon": "^1.14.11",
     "prettier": "^1.10.2",
-    "semantic-release": "^11.0.2"
+    "semantic-release": "^12.4.1"
   },
   "jest": {
     "coverageReporters": [