use poetry v1.2+

[aryarm]

• we should probably use v1.2 of poetry instead of v1.1

v1.2 implements some breaking changes to the structure of the pyproject.toml file. I have taken a look at some of the changes and decided that we will probably need them in the future. For example, one of the changes includes the installation of python packages from Github URLs where the package lives within a subdirectory of the repository, like plink-ng. So it would be best if we moved to v1.2 with haste -- before our project grows to a stage where we need to make lots of changes to the pyproject.toml file

• you should also update the contributing docs to describe how to install the new poetry version

[aryarm]

trouble is that I'd like to install v1.2 inside of a conda environment but there is no v1.2 in the conda-feedstock yet - although, there has been mention of it

so now the plan is to

• fork the feedstock and publish poetry v1.2 to our own conda channel