Create FUNDING.yml

Sponsor button added

Author: dev-rashedin

.github/FUNDING.yml

@@ -0,0 +1,15 @@
+# These are supported funding model platforms
+
+github: [dev-rashedin]
+patreon: 
+open_collective: express-error-toolkit
+ko_fi: dev-rashedin
+tidelift: 
+community_bridge: 
+liberapay: 
+issuehunt: 
+lfx_crowdfunding: 
+polar: 
+buy_me_a_coffee: dev-rashedin
+thanks_dev: 
+custom: ['https://opencollective.com/express-error-toolkit']