Bump lunr from 2.3.8 to 2.3.9

Bumps [lunr](https://github.com/olivernn/lunr.js) from 2.3.8 to 2.3.9.
- [Release notes](https://github.com/olivernn/lunr.js/releases)
- [Changelog](https://github.com/olivernn/lunr.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/olivernn/lunr.js/compare/v2.3.8...v2.3.9

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

package-lock.json

@@ -1575,9 +1575,9 @@
       }
     },
     "lunr": {
-      "version": "2.3.8",
-      "resolved": "https://registry.npmjs.org/lunr/-/lunr-2.3.8.tgz",
-      "integrity": "sha512-oxMeX/Y35PNFuZoHp+jUj5OSEmLCaIH4KTFJh7a93cHBoFmpw2IoPs22VIz7vyO2YUnx2Tn9dzIwO2P/4quIRg=="
+      "version": "2.3.9",
+      "resolved": "https://registry.npmjs.org/lunr/-/lunr-2.3.9.tgz",
+      "integrity": "sha512-zTU3DaZaF3Rt9rhN3uBMGQD3dD2/vFQqnvZCDv4dl5iOzq2IZQqTxu90r4E5J+nP70J3ilqVCrbho2eWaeW8Ow=="
     },
     "mimic-fn": {
       "version": "2.1.0",

package.json

@@ -29,7 +29,7 @@
   "dependencies": {
     "cheerio": "^1.0.0-rc.2",
     "html-entities": "^1.2.1",
-    "lunr": "2.3.8"
+    "lunr": "2.3.9"
   },
   "devDependencies": {
     "chai": "^4.1.2",