Bump testem from 3.9.0 to 3.10.0

Bumps [testem](https://github.com/testem/testem) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/testem/testem/releases)
- [Commits](testem/testem@v3.9.0...v3.10.0)

---
updated-dependencies:
- dependency-name: testem
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -159,7 +159,7 @@
     "rsvp": "^4.8.5",
     "serve-static": "^1.14.2",
     "simple-dom": "^1.4.0",
-    "testem": "^3.9.0",
+    "testem": "^3.10.0",
     "testem-failure-only-reporter": "^1.0.0",
     "typescript": "4.9"
   },

yarn.lock

@@ -10387,10 +10387,10 @@ testem-failure-only-reporter@^1.0.0:
   dependencies:
     testem "^3.0.0"
 
-testem@^3.0.0, testem@^3.8.0, testem@^3.9.0:
-  version "3.9.0"
-  resolved "https://registry.yarnpkg.com/testem/-/testem-3.9.0.tgz#a82ccf01e5a248e3924244186e348c665ab90f7d"
-  integrity sha512-YTxCYKj0cc8uUSKEziJtSC5T/pw4fQnY0ZXNOyvAFgrijfsN9NxmncJZOHLhPgFOuhbRd5i+DBQxw0Cpe0SEFg==
+testem@^3.0.0, testem@^3.10.0, testem@^3.8.0:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/testem/-/testem-3.10.0.tgz#df3f43839892c17f35f4c5994c50c99aa8242bb0"
+  integrity sha512-2BMbPkAJT5xNojNxQGKT8CU9ix4EYDmHjjKFpUeeSW6tBVfFVgOi2vfrpJ5Hwdq4HsfnOALNAWN8/yjuFTgQfA==
   dependencies:
     "@xmldom/xmldom" "^0.8.0"
     backbone "^1.1.2"