Merge pull request #86 from pataar/upgrade_intervention

Upgrade minimum PHP version and dependencies

Merge pull request #66 from VincentChalnot/fix/bigint-dependency

Fixing Hash, removing need for BigInteger implementation

Merge pull request #60 from artyuum/patch-2

Closes #53

Merge pull request #59 from artyuum/patch-1

Now prioritizing Imagick over GD

Merge pull request #38 from bogdanstoik/patch-1

Fix setting of default implementation

Merge pull request #34 from jenssegers/imagick

Imagick

Merge pull request #24 from klermonte/master

Fix hexadecimal to decimal conversion for negative  hashes

Require php ext in composer file

Update readme with decimal mode

Fix image source in readme