added back gcc 7 to CI

Author: jacobwilliams

.github/workflows/CI.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        gcc_v: [8,9,10] # Version of GFortran we want to use.
+        gcc_v: [7,8,9,10] # Version of GFortran we want to use.
         python-version: [3.7]
     env:
       FC: gfortran-${{matrix.gcc_v}}
@@ -57,7 +57,7 @@ jobs:
         --slave /usr/bin/gcov gcov /usr/bin/gcov-${GCC_V}
 
     # - name: Compile_with_build_mkdocs
-    #   if: matrix.gcc_v == 9
+    #   if: matrix.gcc_v == 7
     #   run: |
     #     # GFORTRAN=gfortran-${{matrix.gcc_v}}
     #     # GCOV=gcov-${{matrix.gcc_v}}