actions: continue on linting and coveralls errors

Author: asher-m

.github/workflows/test.yml

@@ -33,6 +33,7 @@ jobs:
         pip install -r requirements.txt
 
     - name: Lint with flake8
+      continue-on-error: true
       run: |
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
@@ -49,6 +50,7 @@ jobs:
         pytest --cov=UncertainSCI
 
     - name: Upload coverage data to coveralls.io
+      continue-on-error: true
       run: |
         pip install coveralls
         coveralls --service=github