build: fix node version

Author: alx

.nvmrc

@@ -1 +1 @@
-10.5.0
+engine-strict=true

package.json

@@ -10,14 +10,14 @@
   },
   "repository": "https://github.com/jolibrain/deepdetect-js",
   "engines": {
-    "node": ">=10.5"
+    "node": ">=10.0.0",
+    "npm": ">=6.0.0"
   },
   "scripts": {
     "start": "nps --no-scripts",
     "precommit": "remove-lockfiles && lint-staged",
     "commitmsg": "commitlint -e $GIT_PARAMS",
     "test": "nps test",
-    "doc": "cd src; groc index.js -o ../doc",
     "semantic-release": "semantic-release",
     "travis-deploy-once": "travis-deploy-once",
     "web-example": "node doc/web-example/server.js"
@@ -30,7 +30,6 @@
     "./index.js": "./dist/deepdetect-browser.js"
   },
   "dependencies": {
-    "groc": "^0.8.0",
     "isomorphic-fetch": "^2.2.1",
     "superagent": "^3.8.3"
   },