fix: remove Python 3.7 test execution (#402)

Python 3.7 is a decomissioned runtime. Tests are failing because of
language features not supported by this python version. Disable these
tests rather than backfixing.

Author: maemayve

.coveragerc-py37

@@ -17,8 +17,6 @@ jobs:
         include:
           - platform: ubuntu-22.04
             python: '3.8'
-          - platform: ubuntu-22.04
-            python: '3.7'
     runs-on: ${{ matrix.platform }}
     steps:
     - name: Harden Runner

.github/workflows/conformance.yml

@@ -11,7 +11,7 @@ jobs:
   test:
     strategy:
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['3.8', '3.9', '3.10', '3.11', '3.12']
         platform: [ubuntu-latest, macos-latest, windows-latest]
         # Python <= 3.9 is not available on macos-latest
         # Workaround for https://github.com/actions/setup-python/issues/696
@@ -21,23 +21,15 @@ jobs:
           python: '3.9'
         - platform: macos-latest
           python: '3.8'
-        - platform: macos-latest
-          python: '3.7'
         - platform: ubuntu-latest
           python: '3.8'
-        - platform: ubuntu-latest
-          python: '3.7'
         include:
         - platform: macos-latest
           python: '3.9'
         - platform: macos-13
           python: '3.8'
-        - platform: macos-13
-          python: '3.7'
         - platform: ubuntu-22.04
           python: '3.8'
-        - platform: ubuntu-22.04
-          python: '3.7'
     runs-on: ${{ matrix.platform }}
     steps:
     - name: Harden Runner

.github/workflows/unit.yml

@@ -16,9 +16,6 @@ envlist =
     py38-ubuntu-22.04
     py38-macos-13
     py38-windows-latest
-    py37-ubuntu-22.04
-    py37-macos-13
-    py37-windows-latest
 
 [testenv]
 usedevelop = true
@@ -31,10 +28,6 @@ deps =
     pretend
 setenv =
     PYTESTARGS = --cov=functions_framework --cov-branch --cov-report term-missing --cov-fail-under=100
-    # Python 3.7: Use .coveragerc-py37 to exclude aio module from coverage since it requires Python 3.8+ (Starlette dependency)
-    py37-ubuntu-22.04: PYTESTARGS = --cov=functions_framework --cov-config=.coveragerc-py37 --cov-branch --cov-report term-missing --cov-fail-under=100
-    py37-macos-13: PYTESTARGS = --cov=functions_framework --cov-config=.coveragerc-py37 --cov-branch --cov-report term-missing --cov-fail-under=100
-    py37-windows-latest: PYTESTARGS =
     windows-latest: PYTESTARGS =
 commands = pytest {env:PYTESTARGS} {posargs}