Merge pull request #2432 from recrof/kiss-radio-everywhere

kiss radio: added stm32 support + envs in platformio.ini

variants/nibble_screen_connect/platformio.ini

@@ -159,3 +159,8 @@ lib_deps =
   ${nibble_screen_connect_base.lib_deps}
   densaugeo/base64 @ ~1.4.0
 
+
+[env:nibble_screen_connect_kiss_modem]
+extends = nibble_screen_connect_base
+build_src_filter = ${nibble_screen_connect_base.build_src_filter}
+  +<../examples/kiss_modem/>