Change CI to GitHub actions

Use copier template from oca/oca-addons-repo-template

Target Python3.8

Apply linting

Fix a missing call to super

.isort.cfg

@@ -0,0 +1,13 @@
+[settings]
+; see https://github.com/psf/black
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+combine_as_imports=True
+use_parentheses=True
+line_length=88
+known_odoo=odoo
+known_odoo_addons=odoo.addons
+sections=FUTURE,STDLIB,THIRDPARTY,ODOO,ODOO_ADDONS,FIRSTPARTY,LOCALFOLDER
+default_section=THIRDPARTY
+ensure_newline_before_comments = True