funding: update link (#27)

Author: servusdei2018

.github/FUNDING.yml

@@ -1,3 +1,12 @@
 # These are supported funding model platforms
 
-custom: 'https://venmo.com/u/natebracy'
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: 'https://www.buymeacoffee.com/nbracy'