Add ghc-8.10.3 to gihub actions

Author: jneira

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ghc: ['8.10.2', '8.10.1', '8.8.4', '8.8.3', '8.8.2', '8.6.5', '8.6.4']
+        ghc: ['8.10.3', '8.10.2', '8.10.1', '8.8.4', '8.8.3', '8.8.2', '8.6.5', '8.6.4']
         os: [ubuntu-latest, macOS-latest, windows-latest]
         exclude:
           - os: windows-latest

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        ghc: ["8.10.2", "8.10.1", "8.8.4", "8.8.3", "8.8.2", "8.6.5", "8.6.4"]
+        ghc: ['8.10.3', "8.10.2", "8.10.1", "8.8.4", "8.8.3", "8.8.2", "8.6.5", "8.6.4"]
         os: [ubuntu-latest, windows-latest]
         exclude:
           - os: windows-latest