[CI] Adicionar Github actions

[gitrubs]

Descrição

Adicionar workflow básico do github actions com testes

Requisitos

Máquina: macOS-latest
Versão do Xcode: 11.2

Sintaxe de exemplo

name: Regular branch
on: [push]
jobs:
  test:
    name: Test Job
    runs-on: macOS-latest
    env:
        DEVELOPER_DIR: /Applications/Xcode_11.2.app/Contents/Developer
    steps:
    - uses: actions/checkout@v2
    - name: Fastlane test
      run: fastlane test