docs: update CHANGELOG for 1.7.0 release

ci: upgrade Github actions to latest versions

build: update Deno libs to std@v0.214.0, Deno 1.40.3

docs: `shCapture` doc commend update

Revert "feat: restrict type `ShOutput.code` to `number` (disallow `undefined`)"

fix: restore `opts.stderr` in `utils.shCapture` to `inherit`

feat: restrict type `ShOutput.code` to `number` (disallow `undefined`)

feat: replace deprecated `Deno.run` function with `Deno.Command` class

build: replace deprecated `Deno.copy()` and `Deno.isatty()`

build: update deps to latest std lib

docs: fix typo

build: update deps to latest Deno std library

build: drop the deprecated Deno `--unstable` flag

build: update Deno to deno_std 0.202.0, deno 1.37.0

docs: README.md: fix typo