v0.4.0

Changelog (since v0.3.0...v0.4.0)

Dependencies updates ⚠️

• Dropped support of PHP < 7.1 #20 (by @yann-eugone)
• Dropped support of Symfony < 4.4 #20 (by @yann-eugone)

Code updates ⚠️

• Added strict type everywhere #20 (by @yann-eugone)

Dev updates

• Updated test framework to PHPUnit 7.* #20 (by @yann-eugone)
• Added checkstyle on tests #20 (by @yann-eugone)
• Added integration with codecov service #25 (by @yann-eugone)

Documentation

• Updated badges for img.shields.io #25 (by @yann-eugone)