[meta] create FUNDING.yml; add funding in package.json

.github/FUNDING.yml

@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [ljharb]
+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: npm/shell-quote
+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: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

package.json

@@ -7,6 +7,9 @@
 		"email": "mail@substack.net",
 		"url": "http://substack.net"
 	},
+	"funding": {
+		"url": "https://github.com/sponsors/ljharb"
+	},
 	"bugs": "https://github.com/ljharb/shell-quote/issues",
 	"devDependencies": {
 		"@ljharb/eslint-config": "^21.0.0",