Set key=val in .json files
npm install kvjsonSet or update key value in .json files
```
./node_modules/.bin/kvjson
file - path to json file
key - json key can be nested path key.lv1.lv2 etc.
value - value to be set
e.g. update version in package.json
./node_modules/.bin/kvjson package.json version 1.0.0
e.g. update dependency version in package.json
./node_modules/.bin/kvjson package.json dependencies.kvjson 1.0.0`