v1.1.0

Made By @ZenthXSin

Update Arc dependency from v145 to 208a754044 (Mindustry 159.7's Arc commit).

Changes

• build.gradle: versions.arc = "v145" → "208a754044"
• BetterCommandHandler: ObjectMap.getNull() → get() (removed in newer Arc)
• EventReceiver: same getNull fix
• test/Tests: SortedSpriteBatch → SpriteBatch, SdlConfig.gl30 → glVersions, mouse() Vec3 fix
• test/build.gradle: removed unused Mindustry dependency