chore: remove "arrowParens" Prettier rule

.prettierrc.yml

@@ -1,10 +1,9 @@
-arrowParens: avoid
 bracketSpacing: true
-endOfLine: auto
+endOfLine: "auto"
 printWidth: 120
 singleQuote: false
 tabWidth: 2
-trailingComma: all
+trailingComma: "all"
 
 overrides:
   - files: "*.sol"