Update build system

Author: felixhammerl

.npmrc

@@ -10,8 +10,8 @@
   "license": "MIT",
   "scripts": {
     "build": "./scripts/build.sh",
-    "release": "./scripts/release.sh",
     "lint": "$(npm bin)/standard",
+    "preversion": "npm run build",
     "test": "npm run lint && npm run unit",
     "unit": "$(npm bin)/mocha './src/*-unit.js' --reporter spec --require babel-register testutils.js",
     "test-watch": "$(npm bin)/mocha './src/*-unit.js' --reporter spec --require babel-register testutils.js --watch"
@@ -25,11 +25,11 @@
     "babel-cli": "^6.26.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-register": "^6.26.0",
-    "chai": "^4.1.2",
-    "mocha": "^5.0.0",
-    "nodemon": "^1.12.1",
+    "chai": "^4.2.0",
+    "mocha": "^6.1.4",
+    "nodemon": "^1.19.1",
     "pre-commit": "^1.2.2",
-    "standard": "^11.0.0"
+    "standard": "^12.0.1"
   },
   "standard": {
     "globals": [