Bump abortcontroller-polyfill from 1.7.1 to 1.7.3 (#631)

Bumps [abortcontroller-polyfill](https://github.com/mo/abortcontroller-polyfill) from 1.7.1 to 1.7.3.
- [Release notes](https://github.com/mo/abortcontroller-polyfill/releases)
- [Commits](https://github.com/mo/abortcontroller-polyfill/commits)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -25,7 +25,7 @@
     "postpublish": "ember ts:clean"
   },
   "dependencies": {
-    "abortcontroller-polyfill": "^1.7.1",
+    "abortcontroller-polyfill": "^1.7.3",
     "broccoli-concat": "^4.2.5",
     "broccoli-debug": "^0.6.5",
     "broccoli-merge-trees": "^4.2.0",

yarn.lock

@@ -2013,10 +2013,10 @@ abbrev@1:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
   integrity sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==
 
-abortcontroller-polyfill@^1.5.0, abortcontroller-polyfill@^1.7.1:
-  version "1.7.1"
-  resolved "https://registry.yarnpkg.com/abortcontroller-polyfill/-/abortcontroller-polyfill-1.7.1.tgz#27084bac87d78a7224c8ee78135d05df430c2d2f"
-  integrity sha512-yml9NiDEH4M4p0G4AcPkg8AAa4mF3nfYF28VQxaokpO67j9H7gWgmsVWJ/f1Rn+PzsnDYvzJzWIQzCqDKRvWlA==
+abortcontroller-polyfill@^1.5.0, abortcontroller-polyfill@^1.7.3:
+  version "1.7.3"
+  resolved "https://registry.yarnpkg.com/abortcontroller-polyfill/-/abortcontroller-polyfill-1.7.3.tgz#1b5b487bd6436b5b764fd52a612509702c3144b5"
+  integrity sha512-zetDJxd89y3X99Kvo4qFx8GKlt6GsvN3UcRZHwU6iFA/0KiOmhkTVhe8oRoTBiTVPZu09x3vCra47+w8Yz1+2Q==
 
 accepts@~1.3.4, accepts@~1.3.5, accepts@~1.3.7:
   version "1.3.7"