Log Message:
lang/spago: Update to 0.20.9

## [0.20.9] - 2022-05-03

Bugfixes:
- Use `iife` format when bundling browser apps (#880)

## [0.20.8] - 2022-04-27

Features:
- Make `spago bundle-app` and `spago bundle-module` use esbuild and es
  modules for projects >= v0.15 (#862)
- Make `spago run` use es modules for projects >= v0.15 (#858)

Bugfixes:
- Fix `spago run` and `spago test` to accept command line arguments
  correctly, by writing a JS file to run (#865, #866)
- Remove support for node versions older than 12.0.0 as they do not work
  with es modules (#866)
- Retry git clone up to two times (#834, #873)

Other improvements:
- Docs: update README with documentation for PureScript v0.15 (#867)
- Linux: support Glibc versions >= `2.24`