yarn-error.log

Arguments: 
  /Users/zzzorgo/.nvm/versions/node/v10.15.3/bin/node /Users/zzzorgo/.yarn/bin/yarn.js add --dev enzyme-adapter-react-16

PATH: 
  /Users/zzzorgo/.yarn/bin:/Users/zzzorgo/.config/yarn/global/node_modules/.bin:/Users/zzzorgo/.nvm/versions/node/v10.15.3/bin:/Users/zzzorgo/Desktop/scripts/:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/munki:/opt/X11/bin:/Users/zzzorgo/.yarn/bin:/Users/zzzorgo/.config/yarn/global/node_modules/.bin:/Users/zzzorgo/.nvm/versions/node/v10.15.3/bin:/Users/zzzorgo/Desktop/scripts/

Yarn version: 
  1.22.0

Node version: 
  10.15.3

Platform: 
  darwin x64

Trace: 
  SyntaxError: /Users/zzzorgo/git/test-jest-plugin/package.json: Unexpected end of JSON input
      at JSON.parse (<anonymous>)
      at /Users/zzzorgo/.yarn/lib/cli.js:1625:59
      at Generator.next (<anonymous>)
      at step (/Users/zzzorgo/.yarn/lib/cli.js:310:30)
      at /Users/zzzorgo/.yarn/lib/cli.js:321:13

npm manifest: 
  

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile