Make a new release now we have ~98% test-coverage.

[Steve Kemp]

• Fix the lint + formatting issues:
  • https://goreportcard.com/report/github.com/skx/gobasic
• Update the README file to set a new threshold on acceptable test-coverage
  • Look at codecov.io / similar to see if we can get a badge.

Then make a new release.

[Steve Kemp]

Also sanity-check docs for readability/detail:

• https://godoc.org/github.com/skx/gobasic

[Steve Kemp]

Released:

• https://github.com/skx/gobasic/releases/tag/release-1.5