[chore] bump eslint from version 7 to 8 (#4553)

Co-authored-by: Ben McCann <[email protected]>

Author: stvnwn

.changeset/fast-crabs-applaud.md

@@ -0,0 +1,5 @@
+---
+'create-svelte': patch
+---
+
+Bump `eslint` from version 7 to 8

packages/create-svelte/shared/+eslint/package.json

@@ -1,6 +1,6 @@
 {
 	"devDependencies": {
-		"eslint": "^7.32.0",
-		"eslint-plugin-svelte3": "^3.2.1"
+		"eslint": "^8.12.0",
+		"eslint-plugin-svelte3": "^4.0.0"
 	}
 }