Log Message:
Update to hslua-2.1.0

hslua-2.1.0 - Released 29-01-2022.
* Update to hslua-objectorientation 2.1.0. This entails changes to deftype'
  and deftypeGeneric, switching the order of item pusher and list-extractor
  function in the tuple passed as the last argument.
* Update to hslua-core 2.1.0, hslua-marshalling 2.1.0, and hslua-classes
  2.1.0.

hslua-2.0.1 - Released 2021-11-04.
* Updated lower bounds of hslua packages:
  hslua >= 2.0.0.2,
  hslua-marshalling >= 2.0.1, and
  hslua-objectorientation >= 2.0.1.
* This fixes a number of smaller issues; see the respective package
  changelogs for details.

hslua-2.0.0 - Released 2021-10-21.
* Move module hierarchy from Foreign.Lua to HsLua.
* Error handling has been reworked completely. The type of exceptions used
  and handled by HsLua is now exposed to the type system. The type Lua
  makes use of a default error type. Custom error handling can be
  implemented by using the LuaE type with an exception type that is an
  instance of class LuaError.
* Renamed stack index helpers to nth, nthTop, nthBottom, top. The following
  have been removed: stackTop, nthFromTop, nthFromBottom.
* Extracted raw Lua bindings into new package lua. This means that all
  cabal flags have been moved to package lua as well. Version lua-1.0.0
  contained the Foreign.Lua.Raw hierarchy as present in hslua-1.3.0. See
  that package’s changelog for info on the additional modifications since
  then.
* The module Foreign.Lua.Raw.Error was merged into the HsLua.Core.Error
  module.
* The functions getglobal and gettable now return the Lua Type of the
  pushed value.
* Extracted new packages:
  * hslua-core: the package contains all modules from the Core sub-hierarchy.
  * hslua-classes: typclasses Peekable and Pushable for pushing and
    pulling, as well as function calling.
  * tasty-hslua: makes testing helpers available for reuse.
* Moved run functions from Util to Core.Run.
* Moved module Utf8 from the base level into Core.
* Refactored code to expose Haskell functions to Lua:
* Removed functions newCFunction, freeCFunction. Use pushHaskellFunction
  instead, it takes care of garbage collection.
* Renamed typeclass ToHaskellFunction to Exposable, function callFunc to
  invoke. All these have been moved to hslua-classes.
* The type PreCFunction is now defined in package lua; HaskellFunction is
  defined in hslua-core.
* Changed pushHaskellFunction to only accept HaskellFunction arguments,
  move it to hslua-core.
* Removed helper functions addfunction and addfield from Module. Use
  documented functions and fields instead.
* Added support for a “since” tag on documented functions; allows to mark
  the library version when a function was introduced in its present form.