Co-authored-by: mickbot-92 <e3rck4b4[at]duck[dot]com>
* Bumping to latest stable dependencies and Gradle.
* [CI] Building with JDK 21 instead of with JDK 11 (JDK 17 works fine too if you remove the latest line of build.gradle).
* Using `mavenCentral()` instead of [deprecated](https://docs.gradle.org/current/userguide/upgrading_version_6.html#jcenter_deprecation) `jcenter()`
* Removing useless Google plugins.
* Setting `compileSdk` to 33 : Upsilon no longer requires the Notification permission.
* versionCode : compiling with the current Unix/Epoch timestamp.
* versionName : using the `UPSILON_VERSION` variable instead of the Omega one + adding the date of compiling.
* Some improvements about icons.
* [CI] Using the latests `uses: ` to make the warning about NodeJS deprecation disappear.
Many thanks to @Yaya-Cout (and to @pi-dev500 too :) 🫡
