Modernization

[ddreggors]

Lint tests were failing due to changes in Go version and Go Plugin versions changing. Several changes had to be made to bring the code to a more modern state.

• Move from io/ioutil (deprecated) to os or io variants of ReadAll/TempDir/TempFile/etc...
  • ioutil.ReadAll -> io.ReadAll
  • ioutil.ReadFile -> os.ReadFile
  • ioutil.ReadDir -> os.ReadDir
  • ioutil.NopCloser -> io.NopCloser
  • ioutil.TempDir -> os.MkdirTemp
  • ioutil.TempFile -> os.CreateTemp
  • ioutil.WriteFile -> os.WriteFile
• Use NewPluginVersion now over InitializePluginVersion
• Add some //nolint lines to avoid errorcheck/staticcheck in some areas
• Add some inline functions to catch errors on some defer statements