build: remove package.json prepare script
build: remove package.json prepare script

The prepare script unnecessarily executed all the tests and linting on every install.

MartinHelmut/number-generator,MartinHelmut/number-generator,MartinHelmut/number-generator,MartinHelmut/number-generator,MartinHelmut/number-generator,MartinHelmut/number-generator