Update README.md

Merge pull request #6 from gardziejewskik/master

Added support for zend-diacrotos in version 2

Merge pull request #4 from php-middleware/use-compatibility-tool

Use double-pass-compatibility

Merge branch 'v3'

Merge pull request #3 from php-middleware/v3

V3

Merge pull request #2 from php-middleware/psr-15

Add support for psr-15

Fix response message to log

Update README.md