Bump @glimmer/tracking from 1.0.3 to 1.0.4

Bumps [@glimmer/tracking](https://github.com/glimmerjs/glimmer.js) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/glimmerjs/glimmer.js/releases)
- [Changelog](https://github.com/glimmerjs/glimmer.js/blob/master/CHANGELOG.md)
- [Commits](glimmerjs/glimmer.js@v1.0.3...v1.0.4)

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

Author: dependabot-preview[bot]

package.json

@@ -34,7 +34,7 @@
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
     "@glimmer/component": "^1.0.3",
-    "@glimmer/tracking": "^1.0.3",
+    "@glimmer/tracking": "^1.0.4",
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-cli": "~3.21.2",

yarn.lock

@@ -1135,10 +1135,10 @@
     "@handlebars/parser" "^1.1.0"
     simple-html-tokenizer "^0.5.10"
 
-"@glimmer/tracking@^1.0.3":
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/@glimmer/tracking/-/tracking-1.0.3.tgz#8b9b42aff6c206edeaaea178a95acc1eff62e61e"
-  integrity sha512-21WR13vPdzt1IQ6JmPPAu4szjV9yKdmLHV3nD0MLDj6/EoYv1c2PqpFBBlp++6xW8OnyDa++cQ8OFoQDP+MRpA==
+"@glimmer/tracking@^1.0.4":
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/@glimmer/tracking/-/tracking-1.0.4.tgz#f1bc1412fe5e2236d0f8d502994a8f88af1bbb21"
+  integrity sha512-F+oT8I55ba2puSGIzInmVrv/8QA2PcK1VD+GWgFMhF6WC97D+uZX7BFg+a3s/2N4FVBq5KHE+QxZzgazM151Yw==
   dependencies:
     "@glimmer/env" "^0.1.7"
     "@glimmer/validator" "^0.44.0"