Update base Go toolchain version.

No functional changes in this release. The minimum Go toolchain version has
been updated to 1.16 and uses of the deprecated io/ioutil package replaced.
Tests now use the go-cmp package instead of reflect.DeepEqual.
Remove old Go versions from the CI config.
tree: d97afd86adfccab08efe1eb65a5d5419745c0e15
  1. bench_test.go
  2. bitbucket-pipelines.yml
  3. go.mod
  4. go.sum
  5. LICENSE
  6. README.md
  7. shell.go
  8. shell_test.go
README.md

shell

http://godoc.org/bitbucket.org/creachadair/shell

The shell package implements basic shell command-line splitting.