fix: Signet client subclasses no longer make the update! method private (#516)

Author: dazuma

lib/googleauth/compute_engine.rb

@@ -154,8 +154,6 @@ def fetch_access_token _options = {}
         end
       end
 
-      private
-
       # Destructively updates these credentials.
       #
       # This method is called by `Signet::OAuth2::Client`'s constructor
@@ -177,6 +175,8 @@ def update! options = {}
         self
       end
 
+      private
+
       def log_fetch_query
         if token_type == :id_token
           logger&.info do

lib/googleauth/service_account.rb

@@ -136,8 +136,6 @@ def needs_access_token?
         super && !enable_self_signed_jwt?
       end
 
-      private
-
       # Destructively updates these credentials
       #
       # This method is called by `Signet::OAuth2::Client`'s constructor
@@ -164,6 +162,8 @@ def update! options = {}
         self
       end
 
+      private
+
       def apply_self_signed_jwt! a_hash
         # Use the ServiceAccountJwtHeaderCredentials using the same cred values
         cred_json = {

lib/googleauth/user_refresh.rb

@@ -135,8 +135,6 @@ def includes_scope? required_scope
         missing_scope.empty?
       end
 
-      private
-
       # Destructively updates these credentials
       #
       # This method is called by `Signet::OAuth2::Client`'s constructor