Audit fails

[jairhenrique]

This formula has some audit fails:

brew audit teresa

luizalabs/teresa-cli/teresa:
  * C: 7: col 3: `version` (line 7) should be put before `sha256` (line 5)
  * C: 12: col 13: Use the `cp` Ruby method instead of `system "cp", "teresa-darwin-amd64", "teresa"`
  * Stable: version v0.21.0 should not have a leading 'v'
  * stable version should not decrease (from v0.22.0 to v0.21.0)
  * fully scope test system calls e.g. system "#{bin}/teresa"
Error: 5 problems in 1 formula