Match SDV's handling of external minimum dependencies

Author: frances-h

.github/workflows/minimum.yml

@@ -31,6 +31,5 @@ jobs:
       run: |
           python -m pip install --upgrade pip
           python -m pip install invoke .[test]
-          python -m pip install "scikit-learn<1.8.0"
     - name: Test with minimum versions
       run: invoke minimum

tasks.py

@@ -21,6 +21,9 @@
     '<=': operator.le,
     '==': operator.eq,
 }
+EXTERNAL_DEPENDENCY_CAPS = {
+    'scikit-learn': '1.8.0'
+}
 
 
 if not hasattr(inspect, 'getargspec'):
@@ -110,6 +113,8 @@ def install_minimum(c):
     if minimum_versions:
         install_deps = ' '.join(minimum_versions)
         c.run(f'python -m pip install {install_deps}')
+        for dep, cap in EXTERNAL_DEPENDENCY_CAPS.items():
+            c.run(f'python -m pip install "{dep}<{cap}"')
 
 
 @task