Add @metamask-previews/* to NPM age gate exceptions (#273)

Author: Mrtenz

.yarnrc.yml

@@ -16,8 +16,13 @@ plugins:
   - path: .yarn/plugins/@yarnpkg/plugin-allow-scripts.cjs
     spec: "https://raw.githubusercontent.com/LavaMoat/LavaMoat/main/packages/yarn-plugin-allow-scripts/bundles/@yarnpkg/plugin-allow-scripts.js"
 
-# Supply Chain Security
+# Configure the NPM minimal age gate to 3 days, meaning packages must be at
+# least 3 days old to be installed.
 npmMinimalAgeGate: 4320 # 3 days (in minutes)
-npmPreapprovedPackages: # Override the minimal age gate
-  - "@metamask/*"
-  - "@lavamoat/*"
+
+# Override the minimal age gate, allowing certain packages to be installed
+# regardless of their publish age.
+npmPreapprovedPackages:
+  - '@metamask/*'
+  - '@metamask-previews/*'
+  - '@lavamoat/*'