README, removed applications section
Maybe modify the application section is not necessary.
I tried this package on elixir 1.14.0 without modify the application section and it works.
I followed this tutorial
https://dockyard.com/blog/2020/01/31/state-timeouts-with-gen_statem
More details:
https://www.amberbit.com/blog/2017/9/22/elixir-applications-vs-extra_applications-guide/
The library certainly works without adding it as an application, but what the application does is register the translator.
https://github.com/ericentin/gen_state_machine/blob/77776ec405364573ad63b1e07d1541ec057e40f9/lib/gen_state_machine/application.ex#L1-L11
This is to make it so that GenStateMachine termination messages are properly logged, see https://elixirforum.com/t/why-does-logger-translator-ignore-gen-statem-reports/37418.