feat(functions): implement jwt template function (#8)

- fixes #6 
- auto add a `exp` claim, with expiry of +15min, in case none was provided
- refactor cli and structure
- refactor test boiler plate into a builder
- add docs and changelog

.github/workflows/build.yml

@@ -65,7 +65,6 @@ jobs:
           - insta test
     runs-on: ${{ matrix.version }}
     continue-on-error: ${{ matrix.rust == 'nightly' }}
-    environment: build
     steps:
       - uses: actions/checkout@v2
       - name: setup | rust

CHANGELOG.md

@@ -8,12 +8,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [Unreleased]: https://github.com/curlz-rs/curlz/compare/v0.1.0-alpha.1...HEAD
 
 ### Added
+- special template function `jwt` for json web tokens [see #6](https://github.com/curlz-rs/curlz/issues/6)
+
 ### Changed
 ### Deprecated 
 ### Removed
 ### Fixed
 ### Security
 ### Contributors
+- [@sassman](https://github.com/sassman)
 
 ## [0.1.0-alpha.2] - 2022-08-16
 [0.1.0-alpha.2]: https://github.com/curlz-rs/curlz/compare/v0.1.0-alpha.1..v0.1.0-alpha.2