Bump mirador from 3.4.2 to 3.4.3

Bumps [mirador](https://github.com/ProjectMirador/mirador) from 3.4.2 to 3.4.3.
- [Release notes](https://github.com/ProjectMirador/mirador/releases)
- [Commits](https://github.com/ProjectMirador/mirador/compare/v3.4.2...v3.4.3)

---
updated-dependencies:
- dependency-name: mirador
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -102,7 +102,7 @@
     "lru-cache": "^7.14.1",
     "markdown-it": "^13.0.2",
     "markdown-it-mathjax3": "^4.3.2",
-    "mirador": "^3.4.2",
+    "mirador": "^3.4.3",
     "mirador-dl-plugin": "^0.13.0",
     "mirador-share-plugin": "^0.16.0",
     "morgan": "^1.10.0",

yarn.lock

@@ -8226,10 +8226,10 @@ mirador-share-plugin@^0.16.0:
   dependencies:
     notistack "^3.0.1"
 
-mirador@^3.4.2:
-  version "3.4.2"
-  resolved "https://registry.yarnpkg.com/mirador/-/mirador-3.4.2.tgz#51ec7ca1b9854792bbe2fa5e13b3692c92e97102"
-  integrity sha512-Gd7G4NkXq6/qD/De5soYspSo9VykAzrGFunKqUI3x9WShoZP23pYIEPoC/96tvfk3KMv+UbAUxDp99Xeo7vnVQ==
+mirador@^3.4.3:
+  version "3.4.3"
+  resolved "https://registry.yarnpkg.com/mirador/-/mirador-3.4.3.tgz#1b083bd037b851d1389758f3c86eb94832b00ec6"
+  integrity sha512-yHoug0MHy4e9apykbbBhK+4CmbZS94zMxmugw2E2VX6iB0b2PKKY0JfYr/QfXh9P29YnWAbymaXJVpgbHVpTVw==
   dependencies:
     "@material-ui/core" "^4.12.3"
     "@material-ui/icons" "^4.9.1"