adding option --edge to install latest edge / preview version

[Leask]

Adding option --edge to install latest edge / preview version.

$ ./install.sh --edge true

$ ./install.sh --edge=true

[code-asher]

This is a fantastic idea!

[code-asher]

Could we leave off the value and set this to true when the flag is set? This is how we have been handling booleans, for example see --dry-run.

[jsjoeio]

This is a fantastic idea! I agree with @code-asher's feedback. Let's mimic how --dry-run is used. If flag passed, set to true else false.

[codecov]

Codecov Report

Merging #4605 (6edb195) into main (c77999b) will not change coverage.
The diff coverage is n/a.

❗ Current head 6edb195 differs from pull request most recent head 746f55a. Consider uploading reports for the commit 746f55a to get more accurate results

@@           Coverage Diff           @@
##             main    #4605   +/-   ##
=======================================
  Coverage   66.14%   66.14%           
=======================================
  Files          30       30           
  Lines        1654     1654           
  Branches      331      331           
=======================================
  Hits         1094     1094           
  Misses        475      475           
  Partials       85       85           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c77999b...746f55a. Read the comment docs.

[Leask]

Adding this commit: updated arg --edge parsing to match the style of --dryrun
746f55a
Thanks for the review :)

[jsjoeio]

Woohoo! Thanks so much

[jsjoeio]

(You can ignore Docs preview - I need to fix it)

[Leask]

Thanks!

Changes requested were made

[Leask]

🆒