refactor(Release): Prebuild binaries must be hosted inside lib folder

When downloading the prebuild binaries as part of the post install hook, these prebuild binaries
must be hosted inside the lib directory together with the compiled source code.

scripts/download-binaries.js

@@ -93,8 +93,19 @@ function downloadBinary(platform, arch, abiName, destFile, gitsha) {
   });
 }
 
-const prebuildsDir = path.join(__dirname, '../', 'prebuilds');
+/**
+ * Create `lib` folder in root directory if it doesn't exist
+ */
+const libDir = path.join(__dirname, '../', 'lib');
+if (!fs.existsSync(libDir)) {
+  fs.mkdirSync(libDir);
+}
 
+/**
+ * The prebuilds directory must be hosted inside `lib` directory together with the
+ * compiled source code.
+ */
+const prebuildsDir = path.join(libDir, 'prebuilds');
 if (!fs.existsSync(prebuildsDir)) {
   fs.mkdirSync(prebuildsDir);
 }