ci(installer): bump release version with npm instead of pnpm (#194)

The preReleaseCommand failed in craft's container with "pnpm: command not
found" -- the image ships npm but not pnpm. Switch to `npm pkg set version`,
a plain package.json edit with no install, lockfile, or git-check side
effects.

Author: evanpurkhiser

scripts/bump-version.sh

@@ -5,9 +5,13 @@
 ### The published artifact is built from packages/installer, so that is the
 ### package.json that must carry the release version -- the repo root is
 ### private and unversioned.
+###
+### Uses `npm pkg set` rather than pnpm: craft's container ships npm but not
+### pnpm, and this is a plain package.json edit -- no install, lockfile, or
+### git checks involved.
 set -euo pipefail
 
 NEW_VERSION="${2}"
 
 cd "$(dirname "$0")/../packages/installer"
-pnpm version "${NEW_VERSION}" --no-git-tag-version --no-git-checks --allow-same-version
+npm pkg set version="${NEW_VERSION}"