release 0.1.4

[forrestguice]

• adds support for solar midnight, blue hour, and golden hour (Add events #11).
• adds "online help" button to the help dialog.
• updates build: adds nightly build flavor; adds git submodule; removes dependency on jitpack.io.
• updates build; Gradle 6.5 -> 7.3.3; Android Gradle Plugin 4.1.3 -> 7.2.2, updates AndroidX libraries.
• updates build; SuntimesAddon dependency 0.4.0 -> 0.4.3