setup: require at least Python 3.7

Python 3.6 is end-of-life since 2021-12-23. Even though 3.7 is also not
supported any more, Debian oldoldstable is still using it. We don't gain
much by dropping its support so let's keep it for the time being.

.github/workflows/workflow.yaml

@@ -8,7 +8,7 @@ jobs:
         timeout-minutes: 15
         strategy:
             matrix:
-                python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+                python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
             fail-fast: false
 
         steps:
@@ -45,8 +45,6 @@ jobs:
                 python3 setup.py bdist_wheel --plat-name manylinux1_x86_64
 
             - name: Upload coverage to Codecov
-              # Coverage is not complete on Python <3.7 (see pym/bob/utils.py)
-              if: matrix.python-version != '3.6'
               uses: codecov/codecov-action@v4
               with:
                 token: ${{ secrets.CODECOV_TOKEN }}

doc/installation.rst

@@ -4,7 +4,7 @@ Installation
 Dependencies
 ============
 
-Bob is built with Python3 (>=3.6). Some additional Python packages are
+Bob is built with Python3 (>=3.7). Some additional Python packages are
 required. They are installed automatically as dependencies.
 
 Apart from the Python dependencies additional run time dependencies could arise,

pym/bob/develop/version.py

@@ -9,8 +9,8 @@
 if sys.version_info.major != 3:
     print("Bob requires Python 3")
     sys.exit(1)
-elif sys.version_info.minor < 6:
-    print("Bob requires at least Python 3.6")
+elif sys.version_info.minor < 7:
+    print("Bob requires at least Python 3.7")
     sys.exit(1)
 
 def getVersion():

setup.py

@@ -129,7 +129,7 @@ class build(build_orig):
     cmdclass = cmdclass,
 
     # Our runtime dependencies
-    python_requires = '>=3.6',
+    python_requires = '>=3.7',
     install_requires = [
         'PyYAML',
         'schema',
@@ -144,8 +144,7 @@ class build(build_orig):
 
     # Installation time dependencies only needed by setup.py
     setup_requires = [
-        'setuptools_scm<7',   # automatically get package version
-                              # TODO: remove constraint when Python 3.7 is required
+        'setuptools_scm',   # automatically get package version
     ],
 
     # Provide executables