Set environment variables for all steps

Author: oschwald

.github/workflows/test-libmaxminddb.yml

@@ -18,6 +18,10 @@ jobs:
 
     name: Python ${{ matrix.python-version }} on ${{ matrix.platform }}
     runs-on: ${{ matrix.platform }}
+    env:
+      MAXMINDDB_REQUIRE_EXTENSION: 1
+      MAXMINDDB_USE_SYSTEM_LIBMAXMINDDB: 1
+      MM_FORCE_EXT_TESTS: 1
 
     steps:
       - name: Checkout
@@ -40,19 +44,14 @@ jobs:
         run: sudo apt install libmaxminddb-dev
         if: matrix.platform == 'ubuntu-latest'
 
+      - name: Install libmaxminddb
+        run: brew install libmaxminddb
+        if: matrix.platform == 'macos-latest'
+
       - name: Build with Werror and Wall
         run: python setup.py build
         env:
           CFLAGS: "-Werror -Wall -Wextra"
-          MAXMINDDB_REQUIRE_EXTENSION: 1
-
-      - name: Install libmaxminddb
-        run: brew install libmaxminddb
-        if: matrix.platform == 'macos-latest'
 
       - name: Test with tox (system libmaxminddb)
         run: tox
-        env:
-          MAXMINDDB_REQUIRE_EXTENSION: 1
-          MAXMINDDB_USE_SYSTEM_LIBMAXMINDDB: 1
-          MM_FORCE_EXT_TESTS: 1