Update Android versions and deps, Go 1.18 support (#5)

Fix Github client init

Update deps, use own gapps package

Introduce own gapps package

Refactor packages, update deps

Update deps

Signed-off-by: Ilya Danilkin <[email protected]>

add platform option to pkg handler

RSS fixes

Fix RSS validation: reverse order, proper URL schema, limit records

Fix linter