adding sponsor button

Author: anapsix

.github/FUNDING.yml

@@ -0,0 +1,7 @@
+# These are supported funding model platforms
+
+github: anapsix
+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