Bundle maintenance tasks (#22)

* Remove codacy config file and status badge

* Remove unused .gitattributes file

* Clean coverage.xml file

* Add python=3.10 support; drop python=3.6

https://endoflife.date/python

* Use strings for version numbers

Author: mdpiper

.codacy.yaml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.8, 3.9]
+        python-version: ["3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v2

.gitattributes

@@ -47,6 +47,7 @@ clean-pyc: ## remove Python file artifacts
 clean-test: ## remove test and coverage artifacts
 	rm -fr .tox/
 	rm -f .coverage
+	rm -f coverage.xml
 	rm -fr htmlcov/
 	rm -fr .pytest_cache
 

.github/workflows/build-test-ci.yml

@@ -11,9 +11,6 @@
 .. image:: https://img.shields.io/badge/code%20style-black-000000.svg
     :target: https://github.com/csdms/bmi
 
-.. image:: https://api.codacy.com/project/badge/Grade/e0252b85fefc402ea4cc5e7949219a94
-    :target: https://www.codacy.com/app/mcflugen/bmi-example-python?utm_source=github.com&utm_medium=referral&utm_content=csdms/bmi-example-python&utm_campaign=Badge_Grade
-
 bmi-example-python
 ==================
 

Makefile

@@ -13,9 +13,10 @@ classifiers =
     License :: OSI Approved :: MIT License
     Operating System :: OS Independent
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
     Programming Language :: Python :: Implementation :: CPython
     Topic :: Scientific/Engineering :: Physics
 url = https://github.com/csdms/bmi-example-python