cocur/chain v0.8.0 released

I just released v0.8.0 of cocur/chain, my PHP library to chain array operations.

For this release I have updated the tooling and depedencies to more recent versions and I fixed the CI runs. Here are the release notes:

Version 0.8.0 (12 September 2019)

• #40 Update tooling and dependencies, set minimum PHP version to 7.2
• #37 Add missing traits \Cocur\Chain\Chain (by nreynis)
• #41 Add ➞ flatMap() (by nreynis)