Add Taproot CI test.

Author: arik-so

.github/workflows/build.yml

@@ -180,6 +180,15 @@ jobs:
           cargo check --no-default-features --features=futures --release
           cargo doc --release
           RUSTDOCFLAGS="--cfg=anchors" cargo doc --release
+      - name: Run cargo check for Taproot build.
+        run: |
+          cargo check --release
+          cargo check --no-default-features --features=no-std --release
+          cargo check --no-default-features --features=futures --release
+          cargo doc --release
+        env:
+          RUSTFLAGS: '--cfg=anchors --cfg=taproot'
+          RUSTDOCFLAGS: '--cfg=anchors --cfg=taproot'
 
   fuzz:
     runs-on: ubuntu-latest

ci/ci-tests.sh

@@ -94,4 +94,6 @@ fi
 echo -e "\n\nTest anchors builds"
 pushd lightning
 RUSTFLAGS="$RUSTFLAGS --cfg=anchors" cargo test --verbose --color always -p lightning
+echo -e "\n\nTest Taproot builds"
+RUSTFLAGS="$RUSTFLAGS --cfg=anchors --cfg=taproot" cargo test --verbose --color always -p lightning
 popd