Whitelist, blacklist env variables; default values

Added support for:

• whitelist
• blacklist
• default values

Fixed missing search input error

v1.2.1

chore: add tests for when no search input provided

Make search input optional

v1.2.0

feat: make search input optional

Fixed but for env variables larger than placeholder

v1.1.0

fix: bump inplacenvsubst lib to major release

First major release

First major release

First iteration

First iteration