Run "npm install" first on "npm run all"

Fixes issue where "npm run lint" fails on missing eslint plugin.

Author: gsf

package.json

@@ -11,7 +11,7 @@
     "lint": "eslint src/**/*.ts",
     "package": "ncc build --source-map --license licenses.txt",
     "test": "jest",
-    "all": "npm run format-check && npm run lint && npm test && npm run build && npm run package"
+    "all": "npm install && npm run format-check && npm run lint && npm test && npm run build && npm run package"
   },
   "repository": {
     "type": "git",