Release v2.6.1

Changes

• Auto release to Hackage by @AlexeyRaga
• Update build, only use cabal by @AlexeyRaga
• Merge pull request #86 from haskell-works/use-cabal-build Update build, only use cabal by @AlexeyRaga
• Cleanup .cabal file by @AlexeyRaga
• Merge pull request #87 from haskell-works/cleanup-build Cleanup .cabal file by @AlexeyRaga
• Upgrade to [email protected] by @newhoggy
• Merge pull request #93 from haskell-works/upgrade-to-haskell-build-2-1-6-16 Upgrade to [email protected] by @newhoggy
• add haddock script by @AlexeyRaga
• Upgrade to [email protected] by @newhoggy
• Add fallback binary cache uri by @newhoggy
• Merge pull request #95 from haskell-works/upgrade-to-haskell-build-2-1-6-17 Upgrade to haskell build 2 1 6 17 by @newhoggy
• Upgrade to [email protected] by @newhoggy
• Merge pull request #97 from haskell-works/upgrade-to-haskell-build-2.0.2 Upgrade to [email protected] by @newhoggy
• Upgrade to ghc-8.6.5 by @newhoggy
• Merge pull request #98 from haskell-works/upgrade-to-ghc-8.6.5 Upgrade to ghc-8.6.5 by @newhoggy
• doc(nix): Document adding rdkafka in Stack + Nix by @sir4ur0n
• Merge pull request #104 from Sir4ur0n/doc/nixRdkafka doc(nix): Document adding rdkafka in Stack + Nix by @AlexeyRaga
• Make rd_kafka_destroy a safe foreign call - It blocks until everything is being destroyed
• It might trigger callbacks

Documentation from librdkafka:

/**
 * @brief Destroy Kafka handle.
 *
 * @remark This is a blocking operation.
 * @remark rd_kafka_consumer_close() will be called from this function
 *         if the instance type is RD_KAFKA_CONSUMER, a \c group.id was
 *         configured, and the rd_kafka_consumer_close() was not
 *         explicitly called by the application. This in turn may
 *         trigger consumer callbacks, such as rebalance_cb.
 *         Use rd_kafka_destroy_flags() with
 *         RD_KAFKA_DESTROY_F_NO_CONSUMER_CLOSE to avoid this behaviour.
 *
 * @sa rd_kafka_destroy_flags()
 */
RD_EXPORT
void        rd_kafka_destroy(rd_kafka_t *rk);
``` by @alexbiehl
- Merge pull request #105 from alexbiehl/patch-1  Make rd_kafka_destroy a safe foreign call by @AlexeyRaga
- Release v2.6.1 by @AlexeyRaga