fix warning

mironal · mironal · commit 6e6dca193e51 · 2022-10-05T12:14:44.000+09:00
Non-'@objc' instance method in extensions cannot be overridden; use 'public' instead
diff --git a/Sources/TwitterAPIKit/TwitterAPIClient.swift b/Sources/TwitterAPIKit/TwitterAPIClient.swift
@@ -86,7 +86,7 @@ open class TwitterAPIClient {
 extension TwitterAPIClient {
     public typealias RefreshOAuth20TokenResultValue = (token: TwitterAuthenticationMethod.OAuth20, refreshed: Bool)
     /// Refresh OAuth2.0 token
-    open func refreshOAuth20Token(
+    public func refreshOAuth20Token(
         type: TwitterAuthenticationMethod.OAuth20WithPKCEClientType,
         forceRefresh: Bool = false,
         _ block: @escaping (Result<RefreshOAuth20TokenResultValue, TwitterAPIKitError>) -> Void
