Update justfile, precommit, and add submodule

Author: pythoninthegrass

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "data_science/pandas/pandas_meetup"]
+	path = data_science/pandas/pandas_meetup
+	url = https://github.com/pythoninthegrass/pandas_meetup.git

.pre-commit-config.yaml

@@ -3,23 +3,23 @@ fail_fast: true
 repos:
   # checks for secrets via rules (gitleaks.toml)
   - repo: https://github.com/zricethezav/gitleaks
-    rev: v8.15.0
+    rev: v8.15.3
     hooks:
       - id: gitleaks
   - repo: https://github.com/ambv/black
-    rev: 22.10.0
+    rev: 23.1.0
     hooks:
     - id: black
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.2
+  - repo: https://github.com/PyCQA/flake8
+    rev: 6.0.0
     hooks:
     - id: flake8
   # - repo: https://github.com/timothycrosley/isort
   #   rev: 5.10.1
   #   hooks:
   #   - id: isort
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.3.0
+    rev: v4.4.0
     hooks:
     - id: check-yaml
     - id: check-added-large-files

data_science/pandas/pandas_meetup

@@ -58,7 +58,17 @@ export-reqs: update-deps
 
 # [git]      update git submodules
 sub:
-    git submodule update --init --recursive && git pull --recurse-submodules
+    @echo "To add a submodule:"
+    @echo "git submodule add https://github.com/username/repo.git path/to/submodule"
+    @echo "Updating all submodules..."
+    git submodule update --init --recursive && git pull --recurse-submodules -j8
+
+# [git]      update pre-commit hooks
+pre-commit:
+    @echo "To install pre-commit hooks:"
+    @echo "pre-commit install"
+    @echo "Updating pre-commit hooks..."
+    pre-commit autoupdate
 
 # [minikube] start minikube + tilt
 start-minikube: