Fix 2165 use prepare (#2166)

* Fixes #2165 - switches postinstall to prepare

* Bumps to v5.14.2 and updates changelog

* Removes version bump

Author: benjamind

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 5.14.2 / 4.14.2
+
+-   Changed website dependency install to `prepare` step from `postinstall` [#2165](https://github.com/mobxjs/mobx/issues/2165).
+
 # 5.14.1 / 4.14.1
 
 -   Fixed a possible issue with action stack errors and multiple mobx versions installed at the same time [#2135](https://github.com/mobxjs/mobx/issues/2135).

package.json

@@ -32,7 +32,7 @@
     "docs:build": "yarn --cwd website build",
     "docs:start": "yarn --cwd website start",
     "docs:publish": "yarn --cwd website publish-gh-pages",
-    "postinstall": "yarn --cwd website install",
+    "prepare": "yarn --cwd website install",
     "dedup": "npx yarn-deduplicate -s fewer yarn.lock"
   },
   "repository": {