fix: update package version when releasing (#595)

scripts/release_npm.sh

@@ -23,10 +23,18 @@ CMD_UPDATE_VERSION="lerna version ${PACKAGE_VERSION} --yes --exact --force-publi
 CMD_PREPARE="yarn prepare"
 CMD_PUBLISH_PACKAGES="lerna publish --repo-version ${PACKAGE_VERSION} --yes --exact --force-publish --no-git-tag-version --no-push --registry https://npm.lwcjs.org ${CANARY} --no-verify-access --no-verify-registry"
 
-# Run
+# Update package versions before preparing the dist files
 echo $CMD_UPDATE_VERSION;
 $CMD_UPDATE_VERSION;
+
 echo $CMD_PREPARE;
 $CMD_PREPARE;
+
+# Publish the packages to npm. Note that lerna cleans the working tree after this as of 3.0.4:
+# https://github.com/lerna/lerna/blob/3cbeeabcb443d9415bb86c4539652b85cd7b4025/commands/publish/index.js#L354-L363
 echo $CMD_PUBLISH_PACKAGES;
 $CMD_PUBLISH_PACKAGES;
+
+# Update package version again for later commit during the "commit release" stage
+echo $CMD_UPDATE_VERSION;
+$CMD_UPDATE_VERSION;