Update MegaLinter config to enable Bandit and Black after bugs fixed

.github/workflows/mega-linter.yaml

@@ -46,7 +46,7 @@ jobs:
       id: ml
       # You can override Mega-Linter flavor used to have faster performance
       # More info at https://nvuillam.github.io/mega-linter/flavors/
-      uses: nvuillam/mega-linter/flavors/python@v4
+      uses: nvuillam/mega-linter@insiders  # Switch back to flavors/python@v4 when done testing
       env:
         # All available variables are described in documentation
         # https://nvuillam.github.io/mega-linter/configuration/

.mega-linter.yml

@@ -8,8 +8,6 @@
 # - SPELL  # Uncomment to disable checks of spelling mistakes
 DISABLE_LINTERS:
 - MARKDOWN_MARKDOWN_TABLE_FORMATTER  # Unable to locally autoformat tables
-- PYTHON_BANDIT  # Unable to set to use repo config file; re-enable when fixed
-- PYTHON_BLACK  # Version in Mega-Linter doesn't yet support Python 3.9
 - PYTHON_MYPY  # Managed externally; relies on locally installed packages
 - PYTHON_PYLINT  # Managed externally; relies on locally installed packages
 - SPELL_CSPELL  # Vast number of false positives
@@ -22,7 +20,7 @@ FORMATTERS_DISABLE_ERRORS: false
 SHOW_ELAPSED_TIME: true
 
 MARKDOWN_MARKDOWNLINT_CONFIG_FILE: LINTER_DEFAULT
-# PYTHON_BANDIT_CONFIG_FILE: LINTER_DEFAULT  # Uncomment when Bandit config supported
+PYTHON_BANDIT_CONFIG_FILE: LINTER_DEFAULT
 PYTHON_BLACK_CONFIG_FILE: LINTER_DEFAULT
 PYTHON_FLAKE8_CONFIG_FILE: LINTER_DEFAULT
 PYTHON_ISORT_CONFIG_FILE: LINTER_DEFAULT