imp(crud): Get Pr number from GitHub to prefill input (#17)

* check for existing pull requests on GitHub

* fix implementation

* add changelog entry

* disable local test on CI

.github/workflows/rust.yml

@@ -16,4 +16,4 @@ jobs:
       - uses: actions/checkout@v3
       - run: rustup update stable && rustup default stable
       - run: cargo build --verbose
-      - run: cargo test --verbose
+      - run: cargo test --verbose --features remote

CHANGELOG.md

@@ -17,5 +17,6 @@ This changelog was created using the `clu` binary
 
 ### Improvements
 
+- (crud) [#17](https://github.com/MalteHerrmann/changelog-utils/pull/17) Get PR number from GitHub to prefill input.
 - (crud) [#14](https://github.com/MalteHerrmann/changelog-utils/pull/14) Keep comments at head of file.
 - (lint) [#6](https://github.com/MalteHerrmann/changelog-utils/pull/6) Remove Python implementation.