Bump handlebars from 4.0.5 to 4.5.3 in /fixtures/ember-cli

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.0.5 to 4.5.3.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/wycats/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.0.5...v4.5.3)

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

Author: dependabot[bot]

fixtures/ember-cli/yarn.lock

@@ -190,7 +190,7 @@ async-some@~1.0.2:
   dependencies:
     dezalgo "^1.0.2"
 
-async@^1.4.0, async@^1.5.2:
+async@^1.5.2:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
@@ -987,6 +987,10 @@ commander@~2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.1.0.tgz#d121bbae860d9992a3d517ba96f56588e47c6781"
 
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+
 commoner@~0.10.3:
   version "0.10.4"
   resolved "https://registry.yarnpkg.com/commoner/-/commoner-0.10.4.tgz#98f3333dd3ad399596bb2d384a783bb7213d68f8"
@@ -2261,14 +2265,14 @@ growly@^1.2.0:
   resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
 
 handlebars@^4.0.4:
-  version "4.0.5"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.0.5.tgz#92c6ed6bb164110c50d4d8d0fbddc70806c6f8e7"
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.5.3.tgz#5cf75bd8714f7605713511a56be7c349becb0482"
   dependencies:
-    async "^1.4.0"
+    neo-async "^2.6.0"
     optimist "^0.6.1"
-    source-map "^0.4.4"
+    source-map "^0.6.1"
   optionalDependencies:
-    uglify-js "^2.6"
+    uglify-js "^3.1.4"
 
 har-validator@~2.0.6:
   version "2.0.6"
@@ -3198,6 +3202,10 @@ [email protected]:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
 
+neo-async@^2.6.0:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
+
 node-emoji@^1.3.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/node-emoji/-/node-emoji-1.4.1.tgz#c9fa0cf91094335bcb967a6f42b2305c15af2ebc"
@@ -4168,7 +4176,7 @@ [email protected]:
   dependencies:
     amdefine ">=0.0.4"
 
-[email protected], source-map@^0.4.2, source-map@^0.4.4:
+[email protected], source-map@^0.4.2:
   version "0.4.4"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
   dependencies:
@@ -4178,6 +4186,10 @@ source-map@^0.5.0, source-map@~0.5.0, source-map@~0.5.1:
   version "0.5.6"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
 
+source-map@^0.6.1, source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
 spawn-args@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/spawn-args/-/spawn-args-0.2.0.tgz#fb7d0bd1d70fd4316bd9e3dec389e65f9d6361bb"
@@ -4468,7 +4480,7 @@ uc.micro@^1.0.0, uc.micro@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.3.tgz#7ed50d5e0f9a9fb0a573379259f2a77458d50192"
 
-uglify-js@^2.6, uglify-js@^2.6.0:
+uglify-js@^2.6.0:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.7.3.tgz#39b3a7329b89f5ec507e344c6e22568698ef4868"
   dependencies:
@@ -4477,6 +4489,13 @@ uglify-js@^2.6, uglify-js@^2.6.0:
     uglify-to-browserify "~1.0.0"
     yargs "~3.10.0"
 
+uglify-js@^3.1.4:
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.3.tgz#f918fce9182f466d5140f24bb0ff35c2d32dcc6a"
+  dependencies:
+    commander "~2.20.3"
+    source-map "~0.6.1"
+
 uglify-to-browserify@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz#6e0924d6bda6b5afe349e39a6d632850a0f882b7"