docs: update DEPENDENCIES.md

DEPENDENCIES.md

+# Dependencies
+
+Castopod uses the following components:
+
+* [Code Igniter 4](https://codeigniter.com) ([MIT License](https://codeigniter.com/user_guide/license.html))
+* [tailwindcss](https://tailwindcss.com/) ([MIT License](https://github.com/tailwindcss/tailwindcss/blob/master/LICENSE))
+* [Tatter\Relations](https://github.com/tattersoftware/codeigniter4-relations) ([MIT License](https://github.com/tattersoftware/codeigniter4-relations/blob/develop/LICENSE))
+* [D3: Data-Driven Documents](https://github.com/d3/d3) ([BSD 3-Clause "New" or "Revised" License](https://github.com/d3/d3/blob/master/LICENSE))
+* [Rollup](https://github.com/rollup/rollup) ([MIT license](https://github.com/rollup/rollup/blob/master/LICENSE.md))
+* [Svelte](https://github.com/sveltejs/svelte) ([MIT license](https://github.com/sveltejs/svelte/blob/master/LICENSE))
+* [User agent list](https://github.com/opawg/user-agents) ([by Open Podcast Analytics Working Group](https://github.com/opawg)) ([MIT license](https://github.com/opawg/user-agents/blob/master/LICENSE))
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