fix: allow fill prop on symbol

Author: stefanprobst

lib/rules/no-unknown-property.js

@@ -49,6 +49,7 @@ const ATTRIBUTE_TAGS_MAP = {
     'polyline',
     'rect',
     'svg',
+    'symbol',
     'text',
     'textPath',
     'tref',

tests/lib/rules/no-unknown-property.js

@@ -58,6 +58,7 @@ ruleTester.run('no-unknown-property', rule, {
     { code: '<svg key="lock" viewBox="box" fill={10} d="d" stroke={1} strokeWidth={2} strokeLinecap={3} strokeLinejoin={4} transform="something" clipRule="else" x1={5} x2="6" y1="7" y2="8"></svg>' },
     { code: '<g fill="#7B82A0" fillRule="evenodd"></g>' },
     { code: '<mask fill="#7B82A0"></mask>' },
+    { code: '<symbol fill="#7B82A0"></symbol>' },
     { code: '<meta property="og:type" content="website" />' },
     { code: '<input type="checkbox" checked={checked} disabled={disabled} id={id} onChange={onChange} />' },
     { code: '<video playsInline />' },