Changelog for base-compat-0.9.2

Changes in 0.9.2

Use the more efficient version of replicateM and replicateM_ introduced in base-4.9

Sync with base-4.9/GHC 8.0
Weakened RealFloat constraints on realPart, imagPart, conjugate, mkPolar, and cis in Data.Complex.Compat
Backport Foreign.ForeignPtr.Safe and Foreign.Marshal.Safe
Generalize filterM, forever, mapAndUnzipM, zipWithM, zipWithM_, replicateM, and replicateM_ in Control.Monad from Monad to Applicative
Backport .Unsafe.Compat modules (for Control.Monad.ST, Control.Monad.ST.Lazy, Foreign.ForeignPtr, and Foreign.Marshal)
Backport forkFinally and forkOSWithUnmask to Control.Concurrent.Compat
Backport Data.Functor.Const
Backport modifyIORef', atomicModifyIORef' and atomicWriteIORef to Data.IORef.Compat
Data.Ratio.{denominator,numerator} have no Integral constraint anymore
Backport modifySTRef' to Data.STRef.Compat
Export String, lines, words, unlines, and unwords to Data.String.Compat
Generalize Debug.Trace.{traceM, traceShowM} from Monad to Applicative
Backport errorWithoutStackTrace to Prelude.Compat
Backport unsafeFixIO and unsafeDupablePerformIO to System.IO.Unsafe.Compat

Backport bitDefault, testBitDefault, and popCountDefault in Data.Bits.Compat to all versions of base
- Backport toIntegralSized to base-4.7
Backport nub and nubBy (as well as union and unionBy, which are implemented in terms of them) to fix logic error in Data.List.Compat
Backport byteSwap16, byteSwap32, and byteSwap64 to Data.Word.Compat
Backport fillBytes in Foreign.Marshal.Utils.Compat
Backport showFFloatAlt and showGFloatAlt to Numeric.Compat

Implement setEnv and unsetEnv in System.Environment.Compat (which were ported from the setenv package). As a result, base-compat now depends on unix on POSIX-like operating systems.
Drop GHC 6.12 (and base-4.2.0.0) compatibility

Retrospective version bump updating the changelog to reflect the changes made in 0.8.0

All orphan instances were split off into a separate package, base-orphans
base-compat no longer redefines the data types Down and Alt. See here for the discussion that led to this change.
Update Control.Monad.Compat for base-4.8.0.0
Update Data.List.Compat for base-4.8.0.0
Update Data.Foldable.Compat for base-4.8.0.0

Add functions and orphan instances introduced by changes to base-4.7.0.0 and base-4.8.0.0

Major refactoring: base-compat no longer aims to replace all base, only new code is included in module .Compat
Removed stubbed modules
Removed generation scripts

Re-export everything from base
provides access to VERSION_base and MIN_VERSION_base CPP macros (with #include "base-compat.h")
Do not re-export System.IO.Error.catch from Prelude for base < 4.6.0
Add Eq/Ord instance for ErrorCall
Remove GHC.IOBase, GHC.Handle, Control.Concurrent.QSem, Control.Concurrent.QSemN, Control.Concurrent.SampleVar, Data.HashTable