Output exact JSON parse error

From: #46 - thanks @mbrodala!

Docker image published too

Update dockerfile

Docker documentation now lives in: https://hub.docker.com/r/brunty/cigar

Adds docker image

Means you can run:

docker run -it -v $(pwd):/app brunty/cigar

To run cigar without needing to add it to your project as a dependency

Bump version in entrypoint because I forgot...

1.12.1

Bump version because I forgot...

Release 1.12.0

• Require the curl extension in composer.json #33 (Thanks to @WyriHaximus)
• Run tests on PHP 7.3 #35 (Thanks to @ntzm)
• Connect and response timeouts #32 (Thanks to @WyriHaximus)

Release 1.11.1

Bump cigar version in CLI output (oops, forgot...)

Release 1.11.0

Add functionality to send custom headers - thanks to @klizas! 😄

Release 1.10.0

Add JSON output format (Thanks to @WyriHaximus)

Release 1.9.0

• Add authorization header support (#27 thanks to @GulDmitry)

Release 1.8.1

Bump version