setup: remove msgpack version dependency

The only reason of this dependency is various vulnerability fixes. We
decided not to enforce the user on this.

Follows #223, part of #198

Author: DifferentialOrange

Diff for: CHANGELOG.md

@@ -198,6 +198,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   functions (PR #252).
 - Extract tarantool.Interval encode and decode to external
   functions (PR #252).
+- Do not enforce msgpack version (#198).
 
 ### Fixed
 - Package build (#238).

Diff for: requirements.txt

@@ -1,4 +1,4 @@
-msgpack>=1.0.4
+msgpack
 pandas
 pytz
 dataclasses; python_version <= '3.6'