chore(changelog): update and add workflow

Author: Alexander Yukal

CHANGELOG.md

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+## [v1.2.1](https://github.com/yukal/slim-validator/compare/f7485d8fa2a84bc3ab4a2156ef62add21f8ae615...a6ca46f363d6f343b1941d5b25eaa31a0529542d) – 2024-01-16
+
+### Refactors
+
+* **tests:**  update tests ([da00c2ad](https://github.com/yukal/gulp-json-loader/commit/da00c2ad5e2d1e292c8150e8818a4b4173f0fbaa))
+
+### Chores
+
+* **readme:**  update and fix typos and grammar ([19e0dbb7](https://github.com/yukal/gulp-json-loader/commit/19e0dbb7d40ee335ce156f1cc0b8541dfd3f47d0))
+* **package:**  update package within dependencies ([2a825757](https://github.com/yukal/gulp-json-loader/commit/2a825757948e66895ad8ddd67a9adb99e8795b8f))
+
+### Continuous Integration
+
+* **action:**  update node matrix ([a6ca46f3](https://github.com/yukal/gulp-json-loader/commit/a6ca46f363d6f343b1941d5b25eaa31a0529542d))
+
+## [v1.2.1](https://github.com/yukal/slim-validator/compare/v1.2.1...f7485d8fa2a84bc3ab4a2156ef62add21f8ae615)
+
+### Build System / Dependencies
+
+* **deps-dev:**
+- **deps-dev:**  bump chai from 4.3.8 to 4.3.10 ([a0f02551](https://github.com/yukal/gulp-json-loader/commit/a0f02551bddefad86d2864cf1e42527d6ebbed0f))
+- **deps-dev:**  bump chai from 4.3.7 to 4.3.8 ([e5d80951](https://github.com/yukal/gulp-json-loader/commit/e5d80951f8f1245879924bd71db2b621e5409d91))
+- **deps-dev:**  bump mocha from 10.1.0 to 10.2.0 ([367897bb](https://github.com/yukal/gulp-json-loader/commit/367897bb4ed1b9812edc867a8c1fc18ffa92d974))
+- **deps:**  bump decode-uri-component from 0.2.0 to 0.2.2 ([4252fa92](https://github.com/yukal/gulp-json-loader/commit/4252fa92d0e6f31d0d31d22a4e23c4b6fc4b3fdf))
+
+### Other Changes
+
+*  codestyle ([515d18d4](https://github.com/yukal/gulp-json-loader/commit/515d18d40e607e7157a646eb27b5c10e83720b5f))
+
+## v1.1.0
+- Updated core
+  - Imposed restrictions on accessing external directories.
+  - There is no need to pass the config data to GulpJsonLoader, now it's optional
+    and defined from defaults. But if you want to change them, you might tune it in
+    both ways: using an old-style passing an object with options to GulpJsonLoader
+    factory or just pass the settings into a package.json. See package.json.
+
+- Updated dependencies
+  - gulp-load-plugins: ^2.0.7
+  - gulp-pug: ^5.0.0
+
+- Improvement of variables names
+  - To distinguish variables from stylistic PAG syntax it is preferable to name
+    variables in a different way as opposed to decoration text. That's why I name 
+    variables with a capital letter and a dollar sign at the beginning.
+    See PUG files to find out more about it.
+
+  - The entry name of the Data loaded from the JSON file is defined in a global
+    space as a "data" entry, now you can change this name as you like.
+    See package.json and PUG files to find out more about it.
+
+- Implemented data caching
+  - The data that has already been loaded will be getting from the cache
+
+- Added tests