Bump @lume/custom-attributes from 0.1.7 to 0.2.1

Bumps [@lume/custom-attributes](https://github.com/matthewp/custom-attributes) from 0.1.7 to 0.2.1.
- [Release notes](https://github.com/matthewp/custom-attributes/releases)
- [Commits](https://github.com/matthewp/custom-attributes/commits/v0.2.1)

---
updated-dependencies:
- dependency-name: "@lume/custom-attributes"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -21,7 +21,7 @@
     "prerelease": "yarn build"
   },
   "devDependencies": {
-    "@lume/custom-attributes": "^0.1.6",
+    "@lume/custom-attributes": "^0.2.1",
     "@open-wc/testing": "^3.2.0",
     "@rollup/plugin-node-resolve": "^15.2.1",
     "@rollup/plugin-terser": "^0.4.3",

yarn.lock

@@ -110,10 +110,10 @@
   dependencies:
     "@lit-labs/ssr-dom-shim" "^1.0.0"
 
-"@lume/custom-attributes@^0.1.6":
-  version "0.1.7"
-  resolved "https://registry.yarnpkg.com/@lume/custom-attributes/-/custom-attributes-0.1.7.tgz#e4c5ede1d6912d1b2f6d758e73736d7036a757c6"
-  integrity sha512-8eJhf1WceVTep/EZKZIfEvs0oarb1R5I30DHWCXe4thcNOAWLIoB6IVP/O2p4go71aIl7FiJ3g+o/VqrHFgsPg==
+"@lume/custom-attributes@^0.2.1":
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/@lume/custom-attributes/-/custom-attributes-0.2.1.tgz#8a68cbe82323f7863f928166eb098114fe878d23"
+  integrity sha512-W5pn6ewjZWIcmuPyJfD9xzohsIFSaIfQ7SBu4Gjte/lsFX/VpmwWakgv94l4x1b+GUvfqEmTDRqmQKUU+70m+A==
   dependencies:
     lowclass "^5.0.0"