InfiniteShooter 0.4.2!

This one's a bit late.

0.4.2's another point release that just fixes bugs and polishes InfiniteShooter. I fixed some Z-fighting with the docking station model by extruding some planes (I mean, why would the station have a landing area that's a bunch of infinitely thin planes anyway?) and ensured InfiniteShooter worked with Godot 3.5 (maybe having some fun along the way), and we also got a cool new contribution from @Frizy13 for a setting to adjust the animation speed of the sky as to help make it less dizzying. Below you can see a bit more detailed list of all the changes. Thanks for playing InfiniteShooter and hope you enjoy this release!

- Added a slider to adjust the background speed (@Frizy13, #7 and #9)

- Removed hard-coding for the FPS Limit OptionButton (#10)

- Added an option to remove the FPS Limit (https://github.com/pastthepixels/InfiniteShooter/commit/b8ada332b00d56fcbd6b3464ca8f60907a1c7948)

- Enabled asynchronous shader compilation and physics interpolation (https://github.com/pastthepixels/InfiniteShooter/commit/e7e362ec3d82a6dffc63a99dd1369104ef89fd7e)

- Added an option to adjust the frame rate of the physics engine (https://github.com/pastthepixels/InfiniteShooter/commit/e237fecef59fe5734aa198e46ceaf5878fbabb22)

- Addressed a lot of errors/warnings (https://github.com/pastthepixels/InfiniteShooter/commit/90e5f35ae2bd52a289e2a228eac581cbc9c5fc1d, https://github.com/pastthepixels/InfiniteShooter/commit/390c4cca8ab94d8f3f32fe4fdfee599efca93a2f)