Log Message:
janet: update to 1.16.1

## 1.16.1 - 2021-06-09
- Add `maclintf` - a utility for adding linting messages when inside macros.
- Print source code of offending line on compiler warnings and errors.
- Fix some issues with linting and re-add missing `make docs`.
- Allow controlling linting with dynamic bindings `:lint-warn`, `:lint-error`, \ 
and `:lint-levels`.
- Add `-w` and `-x` command line flags to the `janet` binary to set linting \ 
thresholds.
  linting thresholds are as follows:
    - :none - will never be trigger.
    - :relaxed - will only trigger on `:relaxed` lints.
    - :normal - will trigger on `:relaxed` and `:normal` lints.
    - :strict - will trigger on `:strict`, `:normal`, and `:relaxed` lints. This \ 
will catch the most issues
      but can be distracting.