Support .yarnrc in addition to .npmrc

This is a follow-up to #152.

Author: NMinhNguyen

src/makePatch.ts

@@ -102,11 +102,13 @@ export function makePatch({
       "package.json",
     )).version as string
 
-    // copy .npmrc in case if packages are hosted in private registry
-    const npmrcPath = join(appPath, ".npmrc")
-    if (existsSync(npmrcPath)) {
-      copySync(npmrcPath, join(tmpRepo.name, ".npmrc"))
-    }
+    // copy .npmrc/.yarnrc in case packages are hosted in private registry
+    [".npmrc", ".yarnrc"].forEach(rcFile => {
+      const rcPath = join(appPath, rcFile)
+      if (existsSync(rcPath)) {
+        copySync(rcPath, join(tmpRepo.name, rcFile))
+      }
+    })
 
     if (packageManager === "yarn") {
       console.info(