remove support to L7 and php72

Merge pull request #40 from cesargb/bug_cookie

fix: cookie can return an array or string

Update README.md

Merge pull request #36 from vanushwashere/feature/max_token_length

Token length changes

doc: add more samples

Merge pull request #29 from benlumley/master

Fix for null argument to lifetime not being considered.

Merge pull request #29 from benlumley/master

Fix for null argument to lifetime not being considered.

fix version

Merge pull request #27 from cesargb/middleware

Middleware and custom responses

Merge pull request #25 from cesargb/postgres

Add support to PostgreSQL