1.4.0

release 1.4.0

[1.4.0](https://github.com/kivy/pyjnius/tree/1.4.0) (2021-08-24)
[Full Changelog](https://github.com/kivy/pyjnius/compare/1.3.0...1.4.0)

**Implemented enhancements:**
- [\#542](https://github.com/kivy/pyjnius/pull/542) Improve performance of byte array parameters
- [\#515](https://github.com/kivy/pyjnius/pull/515) Allow passing Python Lambdas as Java lambdas
- [\#541](https://github.com/kivy/pyjnius/pull/541) Refactor of env.py

**Fixed bugs:**
- [\#549](https://github.com/kivy/pyjnius/pull/549) Fixes #548 JVM options are not correctly set by jnius_config.set_options()
- [\#546](https://github.com/kivy/pyjnius/pull/546) Add in missing assignable check for int parameters etc.
- [\#558](https://github.com/kivy/pyjnius/pull/558) Improve error message on method not found
- [\#567](https://github.com/kivy/pyjnius/pull/567) Fix static methods
- [\#566](https://github.com/kivy/pyjnius/pull/566) fix bug for constuctors with variable arguments
- [\#569](https://github.com/kivy/pyjnius/pull/569) set_resolve_info: replace j_self w/ resolve_static
- [\#595](https://github.com/kivy/pyjnius/pull/595) Use Python standard library `which` instead of OS `which`

**Documentation**
- [\#556](https://github.com/kivy/pyjnius/pull/556) fix link in readme
- [\#572](https://github.com/kivy/pyjnius/pull/572) update readme for python3
- [\#584](https://github.com/kivy/pyjnius/pull/584) Updated android.rst for python3
- [\#565](https://github.com/kivy/pyjnius/pull/565) Update python versions

**CI**
- [\#560](https://github.com/kivy/pyjnius/pull/560) added x86 workflow
- [\#564](https://github.com/kivy/pyjnius/pull/564) run on pull request & add missing badge
- [\#536](https://github.com/kivy/pyjnius/pull/536) add missing architecture for python setup in actions

**Packaging**
- [\#594](https://github.com/kivy/pyjnius/pull/594) Add pyproject.toml to specify Cython as a build requirement