Release v3.1.2

Changes

• tech(nix): Add nettools to shell.nix for ifconfig by @sir4ur0n
• Merge pull request #147 from Sir4ur0n/tech/addNettools tech(nix): Add nettools to shell.nix for ifconfig by @AlexeyRaga
• Upgrade to orb hackage@1.4.2 by @newhoggy
• Merge pull request #148 from haskell-works/upgrade-to-orb-hackage@1.4.2 Upgrade to orb hackage@1.4.2 by @newhoggy
• doc: Add documentation on Producer and remaining modules by @sir4ur0n
• Merge pull request #149 from Sir4ur0n/doc/kafkaProducer doc: Add documentation on Producer and remaining modules by @AlexeyRaga
• Disable integration tests by default by @AlexeyRaga
• Merge pull request #150 from haskell-works/disable-integration-tests Disable integration tests by default by @AlexeyRaga
• Bump version: release on Hackage by @AlexeyRaga