pre-release v1.8.3rc1

fix github action by updating pytest from conda to mamba (#129)

* first attempt

* fixed indentation

* fixed indentation

* updated pyincore version in environment.yml

* added in-core channel in environmet.yml

* updated readme

* updated mamba for conda build

* updated mamba command

* used mambabuild

* install boa

* added mamba shell

* added micromamba on conda build

* rollback to previous conda build

* upgraded pyincore version

* updated pyincore to 1.11.0

* revert all back

* make conda build to use python 3.9

* added mamba shell

* added args

* fixed version information

* updated changelog