Fix bundle acessor (#523)

* Fix #522

* Let's play safe

Co-authored-by: Bruno Guidolim <bruno@pockid.com>

PhoneNumberKit/Bundle+Resources.swift

@@ -9,6 +9,7 @@ private class CurrentBundleFinder {}
 //
 extension Bundle {
     static var phoneNumberKit: Bundle = {
+        #if DEBUG && SWIFT_PACKAGE
         let bundleName = "PhoneNumberKit_PhoneNumberKit"
         let candidates = [
             /* Bundle should be present here when the package is linked into an App. */
@@ -26,6 +27,12 @@ extension Bundle {
                 return bundle
             }
         }
-        fatalError("Could not find bundle \(bundleName), tried candidates: \(candidates)!")
+        #endif
+
+        #if SWIFT_PACKAGE
+        return Bundle.module
+        #else
+        return Bundle(for: CurrentBundleFinder.self)
+        #endif
     }()
 }