Add payjoin-defaults io crate (#220)

start #211

Author: DanGould

.github/workflows/rust.yml

@@ -34,12 +34,15 @@ jobs:
       - name: test payjoin v1 integration
         run: cargo test --package payjoin --verbose --features=send,receive --test integration
       - name: test payjoin v2 integration
-        run: cargo test --package payjoin --verbose --features=send,receive,v2 --test integration
+        run: cargo test --package payjoin-defaults --verbose --features=danger-local-https,v2 --test integration
       - name: test payjoin-cli bin v1
         run: cargo test --package payjoin-cli --verbose --features=danger-local-https
       - name: build payjoin-cli bin v2
         if: matrix.rust != '1.63.0'
         run: cargo build --package payjoin-cli --verbose --features=v2
+      - name: build payjoin-cli bin v2 with danger-local-https
+        if: matrix.rust != '1.63.0'
+        run: cargo build --package payjoin-cli --verbose --features=danger-local-https,v2
 
   fmt:
     runs-on: ubuntu-latest