Upodate to @ember/test-waiters@2.3.2.

Fixes issues with IE11 compat.

package.json

@@ -34,7 +34,7 @@
     "test:all": "ember try:each"
   },
   "dependencies": {
-    "@ember/test-waiters": "^2.3.1",
+    "@ember/test-waiters": "^2.3.2",
     "broccoli-debug": "^0.6.5",
     "broccoli-funnel": "^3.0.3",
     "ember-auto-import": "^1.7.0",

yarn.lock

@@ -1937,10 +1937,10 @@
     ember-cli-babel "^6.16.0"
     ember-compatibility-helpers "^1.1.1"
 
-"@ember/test-waiters@^2.3.1":
-  version "2.3.1"
-  resolved "https://registry.yarnpkg.com/@ember/test-waiters/-/test-waiters-2.3.1.tgz#b3f3e82081fa7fa90dbfec9b5bd8d59ee701e34b"
-  integrity sha512-abpI2ms3UjsUWVs4Jxvo/6+1/zwzk6Akj9JSfUVzrXTribQwcTozVfrTCRprq5ue5moCryGUlmceAqhfvYesbw==
+"@ember/test-waiters@^2.3.2":
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/@ember/test-waiters/-/test-waiters-2.3.2.tgz#5d416d25209b25b16116df0a01a856437362b7eb"
+  integrity sha512-4zDQd14br6VzvBf0PD/dm6Vg9nG33WUW14UGI26k+iOGG9iY++pHL5+PnrvCxxrZ9867EPTULy8K2oneenAtSw==
   dependencies:
     calculate-cache-key-for-tree "^2.0.0"
     ember-cli-babel "^7.21.0"
@@ -2845,7 +2845,7 @@ abbrev@1:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
   integrity sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==
 
-abortcontroller-polyfill@^1.1.9, abortcontroller-polyfill@^1.4.0:
+abortcontroller-polyfill@^1.4.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/abortcontroller-polyfill/-/abortcontroller-polyfill-1.5.0.tgz#2c562f530869abbcf88d949a2b60d1d402e87a7c"
   integrity sha512-O6Xk757Jb4o0LMzMOMdWvxpHWrQzruYBaUruFaIOfAQRnWFxfdXYobw12jrVHGtoXk6WiiyYzc0QWN9aL62HQA==
@@ -4392,7 +4392,7 @@ broccoli-merge-trees@^2.0.0:
     broccoli-plugin "^1.3.0"
     merge-trees "^1.0.1"
 
-broccoli-merge-trees@^3.0.0, broccoli-merge-trees@^3.0.1, broccoli-merge-trees@^3.0.2:
+broccoli-merge-trees@^3.0.1, broccoli-merge-trees@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz#f33b451994225522b5c9bcf27d59decfd8ba537d"
   integrity sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==
@@ -6415,21 +6415,6 @@ ember-cli-preprocess-registry@^3.3.0:
     debug "^3.0.1"
     process-relative-require "^1.0.0"
 
-ember-cli-pretender@^3.1.1:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/ember-cli-pretender/-/ember-cli-pretender-3.2.0.tgz#8d91a20bb5f57092a328317591ec1dd622fcadf1"
-  integrity sha512-3q7a0bjbHAevWaQQE447McT1neQIMgBjllfbOVX27D1qQqCZ5h6qMsRe7fU44B6/UQcCcghpbNoeEcNcI56wOg==
-  dependencies:
-    abortcontroller-polyfill "^1.1.9"
-    broccoli-funnel "^2.0.1"
-    broccoli-merge-trees "^3.0.0"
-    chalk "^2.4.2"
-    ember-cli-babel "^6.6.0"
-    fake-xml-http-request "^2.0.0"
-    pretender "^3.0.1"
-    route-recognizer "^0.3.3"
-    whatwg-fetch "^3.0.0"
-
 ember-cli-shims@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/ember-cli-shims/-/ember-cli-shims-1.2.0.tgz#0f53aff0aab80b5f29da3a9731bac56169dd941f"
@@ -7485,7 +7470,7 @@ extsprintf@^1.2.0:
   resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz#e2689f8f356fad62cca65a3a91c5df5f9551692f"
   integrity sha1-4mifjzVvrWLMplo6kcXfX5VRaS8=
 
-fake-xml-http-request@^2.0.0, fake-xml-http-request@^2.1.1:
+fake-xml-http-request@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/fake-xml-http-request/-/fake-xml-http-request-2.1.1.tgz#279fdac235840d7a4dff77d98ec44bce9fc690a6"
   integrity sha512-Kn2WYYS6cDBS5jq/voOfSGCA0TafOYAUPbEp8mUVpD/DVV5bQIDjlq+MLLvNUokkbTpjBVlLDaM5PnX+PwZMlw==
@@ -11524,7 +11509,7 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
 
-pretender@^3.0.1, pretender@^3.4.3:
+pretender@^3.4.3:
   version "3.4.3"
   resolved "https://registry.yarnpkg.com/pretender/-/pretender-3.4.3.tgz#a3b4160516007075d29127262f3a0063d19896e9"
   integrity sha512-AlbkBly9R8KR+R0sTCJ/ToOeEoUMtt52QVCetui5zoSmeLOU3S8oobFsyPLm1O2txR6t58qDNysqPnA1vVi8Hg==
@@ -14543,7 +14528,7 @@ whatwg-encoding@^1.0.1, whatwg-encoding@^1.0.5:
   dependencies:
     iconv-lite "0.4.24"
 
-whatwg-fetch@^3.0.0, whatwg-fetch@^3.4.0:
+whatwg-fetch@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-3.4.0.tgz#e11de14f4878f773fbebcde8871b2c0699af8b30"
   integrity sha512-rsum2ulz2iuZH08mJkT0Yi6JnKhwdw4oeyMjokgxd+mmqYSd9cPpOQf01TIWgjxG/U4+QR+AwKq6lSbXVxkyoQ==