make prospector always exit with zero (refs #46)

Author: cwmeijer

.github/workflows/python-package.yml

@@ -29,9 +29,9 @@ jobs:
       - name: Show pip list
         run: |
           pip list
-      - name: Check style against standards using prospector
+      - name: Check style against standards using prospector (only warn for now, but never fail)
         shell: bash -l {0}
-        run: prospector --profile linter_profile -o grouped -o pylint:pylint-report.txt
+        run: prospector --profile linter_profile -o grouped -o pylint:pylint-report.txt --zero-exit
       - name: Run unit test / Test coverage with Scrutinizer
         run: |
           pytest
@@ -69,6 +69,6 @@ jobs:
       - name: Run unit tests
         run: |
           pytest
-      - name: Check style against standards using prospector
+      - name: Check style against standards using prospector (only warn for now, but never fail)
         shell: bash -l {0}
-        run: prospector --profile linter_profile -o grouped -o pylint:pylint-report.txt
+        run: prospector --profile linter_profile -o grouped -o pylint:pylint-report.txt --zero-exit