Improve doctest setup

.github/workflows/on-push.yml

@@ -0,0 +1,48 @@
+name: Run Tests
+
+on: [push]
+
+jobs:
+  cabal:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache Cabal dir
+      uses: actions/cache@v3
+      with:
+        path: ~/.cabal
+        key: ${{ runner.os }}-cabal-${{ hashFiles('*.cabal') }}
+        restore-keys: ${{ runner.os }}-cabal-
+
+    - run: cabal test
+    - run: cabal repl --with-ghc=doctest --ghc-options="-XQuasiQuotes -XOverloadedStrings"
+
+  stackage:
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        resolver:
+        - 'lts'
+        - 'lts-10'
+        - 'lts-11'
+        - 'lts-12'
+        - 'lts-13'
+        - 'lts-14'
+        - 'lts-15'
+        - 'lts-16'
+        - 'lts-17'
+        - 'lts-18'
+        - 'lts-19'
+        - 'lts-20'
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache stack dir
+      uses: actions/cache@v3
+      with:
+        path: ~/.stack
+        key: ${{ runner.os }}-stack-${{ matrix.resolver }}-${{ hashFiles('*.cabal') }}
+        restore-keys: ${{ runner.os }}-stack-${{ matrix.resolver }}-
+
+    - run: stack test --haddock --no-terminal --resolver ${{ matrix.resolver }}

.gitignore

@@ -1,6 +1,7 @@
 .cabal-sandbox/
 cabal.sandbox.config
 dist/
+dist-newstyle/
 .stack-work/
 .vscode/
 

email-validate.cabal

@@ -47,13 +47,3 @@ test-suite Main
         hspec >= 2.2.3 && < 2.11,
         QuickCheck >= 2.4 && < 2.15,
         bytestring >= 0.9 && < 0.12
-
-test-suite doctests
-    type: exitcode-stdio-1.0
-    ghc-options: -threaded
-    default-language: Haskell2010
-    hs-source-dirs: tests
-    main-is: doctests.hs
-    build-depends:
-        base >= 4 && < 5,
-        doctest >= 0.8 && < 0.21