update deps + CI (#32)

Update README.md

Merge pull request #22 from go-playground/upgrade-to-go-modules

covert to Go Modules

Backing locales package updated to CLDR v30.0.3

- Backing package https://github.com/go-playground/locales regenerated from CLDR v30.0.3 data
- Updated documentation to reflect update.

Merge pull request #12 from go-playground/file-import-export

Add File Import/Export logic

Merge pull request #8 from tmc/patch-1

fix small typo

update error type text

Update README.md

Fix example not that GetTranslator() has multiple return values.

correct error with param index calculation in normal translations.