Bump is-svg from 4.2.1 to 4.3.1 in /flaskbb/themes/aurora

Bumps [is-svg](https://github.com/sindresorhus/is-svg) from 4.2.1 to 4.3.1.
- [Release notes](https://github.com/sindresorhus/is-svg/releases)
- [Commits](https://github.com/sindresorhus/is-svg/compare/v4.2.1...v4.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

flaskbb/themes/aurora/package-lock.json

@@ -1580,6 +1580,13 @@
         "picomatch": "^2.2.1"
       }
     },
+    "fast-xml-parser": {
+      "version": "3.19.0",
+      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-3.19.0.tgz",
+      "integrity": "sha512-4pXwmBplsCPv8FOY1WRakF970TjNGnGnfbOnLqjlYvMiF1SR3yOHyxMR/YCXpPTOspNF5gwudqktIP4VsWkvBg==",
+      "dev": true,
+      "optional": true
+    },
     "fastq": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.9.0.tgz",
@@ -2005,13 +2012,6 @@
       "integrity": "sha512-f/wzC2QaWBs7t9IYqB4T3sR1xviIViXJRJTWBlx2Gf3g0Xi5vI7Yy4koXQ1c9OYDGHN9sBy1DQ2AB8fqZBWhUg==",
       "dev": true
     },
-    "html-comment-regex": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/html-comment-regex/-/html-comment-regex-1.1.2.tgz",
-      "integrity": "sha512-P+M65QY2JQ5Y0G9KKdlDpo0zK+/OHptU5AaBwUfAIDJZk1MYf32Frm84EcOytfJE0t5JvkAnKlmjsXDnWzCJmQ==",
-      "dev": true,
-      "optional": true
-    },
     "http-cache-semantics": {
       "version": "3.8.1",
       "resolved": "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-3.8.1.tgz",
@@ -2373,13 +2373,13 @@
       "optional": true
     },
     "is-svg": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/is-svg/-/is-svg-4.2.1.tgz",
-      "integrity": "sha512-PHx3ANecKsKNl5y5+Jvt53Y4J7MfMpbNZkv384QNiswMKAWIbvcqbPz+sYbFKJI8Xv3be01GSFniPmoaP+Ai5A==",
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/is-svg/-/is-svg-4.3.1.tgz",
+      "integrity": "sha512-h2CGs+yPUyvkgTJQS9cJzo9lYK06WgRiXUqBBHtglSzVKAuH4/oWsqk7LGfbSa1hGk9QcZ0SyQtVggvBA8LZXA==",
       "dev": true,
       "optional": true,
       "requires": {
-        "html-comment-regex": "^1.1.2"
+        "fast-xml-parser": "^3.19.0"
       }
     },
     "is-symbol": {