deps: upgrade rpt2 to latest v0.32.0 to fix monorepos (#967)

* deps: upgrade rpt2 to latest v0.32.0 to fix monorepos

- rpt2 v0.30.0 supports compiling files outside of the project directory
  with no additional configuration (e.g. of `rootDir`) as it upgraded
  its dep of `@rollup/pluginutils` to v4, which has a breaking change
  affecting `createFilter`
  - essentially, the change to `@rollup/pluginutils` allows transforming
    files outside of the project dir

- rpt2 v0.32.0 supports symlinks, such as with monorepos built w/ pnpm

- previously, microbundle was using rpt2 v0.29.0, which is about ~1.5
  years out-of-date

* add changeset

.changeset/green-foxes-poke.md

@@ -0,0 +1,5 @@
+---
+'microbundle': patch
+---
+
+deps: upgrade rpt2 to latest v0.32.0 to fix monorepos