Log Message:
Update to zlib-0.6.2.1

0.6.2.1
 * Add support for GHC 8.8 / base-4.13

0.6.2
 * New cabal flag 'pkg-config' for discovering 'zlib` via pkg-config(1) (#16)
 * Use CApiFFI where available for cross-compile friendliness (#14)
 * Change the window bits range from 8..15 to 9..15 (#11)

0.6.1.2
 * Fix a segfault when reading the stream multithreaded, #7
 * New experimental cabal flag 'non-blocking-ffi' for 'safe' ffi calls

0.6.1.1
 * Fixed building with GHC 7.0 and 7.2

0.6.0.2
 * Fixed building with GHC 7.0 and 7.2

0.6.1.0
 * Support for concatenated gzip files (multiple back-to-back streams)

0.6.0.1
 * Fixed building with older GHC
 * Fixed warnings with new GHC
 * Fixed building on Windows
 * Fixed testsuite

0.6.0.0
 * New incremental interface for compression and decompression
 * Provide access to unconsumed trailing data
 * Simplified structured error type, and instance of Exception
 * Updated bundled zlib C code to 1.2.8 (used on Windows)
 * Fixed memory leak of zlib z_stream C structure
 * More derivied instances (Eq, Show, Typeable, Generic)

0.5.4.2
 * Builds with GHC 7.10