Add "sideEffects": false to package.json (#17949)

package.json

@@ -222,5 +222,6 @@
     "not op_mini all"
   ],
   "preferUnplugged": true,
-  "packageManager": "yarn@4.10.3"
+  "packageManager": "yarn@4.10.3",
+  "sideEffects": false
 }

packages/plugin-hermes/package.json

@@ -18,5 +18,6 @@
   "funding": "https://github.com/prettier/prettier?sponsor=1",
   "homepage": "https://github.com/prettier/prettier/tree/main/packages/plugin-hermes",
   "author": "fisker Cheung <lionkay@gmail.com>",
-  "license": "MIT"
+  "license": "MIT",
+  "sideEffects": false
 }

packages/plugin-oxc/package.json

@@ -18,5 +18,6 @@
   "funding": "https://github.com/prettier/prettier?sponsor=1",
   "homepage": "https://github.com/prettier/prettier/tree/main/packages/plugin-oxc",
   "author": "fisker Cheung <lionkay@gmail.com>",
-  "license": "MIT"
+  "license": "MIT",
+  "sideEffects": false
 }

scripts/build/build-dependencies-license.js

@@ -134,8 +134,7 @@ async function buildDependenciesLicense({
     throw new Error(`${fileName} should be last file to build.`);
   }
 
-  const shouldBuildLicense =
-    !cliOptions.files && typeof cliOptions.minify !== "boolean";
+  const shouldBuildLicense = !cliOptions.files;
 
   if (!shouldBuildLicense) {
     return { skipped: true };

scripts/build/build-package-json.js

@@ -23,6 +23,7 @@ const keysToKeep = [
   "engines",
   "files",
   "preferUnplugged",
+  "sideEffects",
 ];
 
 const publishConfig = {