rss-email 0.2.0

Hugo Osvaldo Barrera (1):
      Implement async fetching

jman (1):
      Use RustTLS instead of native OpenSSL

witcher (14):
      Strip symbols on release builds + building docs
      CI: Build in release mode
      Update Cargo.lock
      CI: Remove step verifying signature of commit
      CI: Remove `openssl-dev` package
      CI: Remove build artifacts
      CI: Use release builds only
      Replace diesel with sqlx
      Add migrations to use with sqlx
      Add `sqlx-data.json` for building in offline mode
      Build CI in debug mode
      Elaborate on sqlx for compiling and contributing
      Fix clippy lint
      Bump version