[Security] Bump handlebars from 4.1.1 to 4.6.0 in /build

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.1.1 to 4.6.0. **This update includes security fixes.**
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/master/release-notes.md)
- [Commits](https://github.com/wycats/handlebars.js/compare/v4.1.1...v4.6.0)

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

build/package-lock.json

@@ -691,7 +691,7 @@
     },
     "chalk": {
       "version": "1.1.3",
-      "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "dev": true,
       "requires": {
@@ -833,9 +833,9 @@
       }
     },
     "commander": {
-      "version": "2.19.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
-      "integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==",
+      "version": "2.20.3",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+      "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
       "dev": true,
       "optional": true
     },
@@ -2303,9 +2303,9 @@
       "dev": true
     },
     "handlebars": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.1.1.tgz",
-      "integrity": "sha512-3Zhi6C0euYZL5sM0Zcy7lInLXKQ+YLcF/olbN010mzGQ4XVm50JeyBnMqofHh696GrciGruC7kCcApPDJvVgwA==",
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.6.0.tgz",
+      "integrity": "sha512-i1ZUP7Qp2JdkMaFon2a+b0m5geE8Z4ZTLaGkgrObkEd+OkUKyRbRWw4KxuFCoHfdETSY1yf9/574eVoNSiK7pw==",
       "dev": true,
       "requires": {
         "neo-async": "^2.6.0",
@@ -3481,9 +3481,9 @@
       "dev": true
     },
     "neo-async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.0.tgz",
-      "integrity": "sha512-MFh0d/Wa7vkKO3Y3LlacqAEeHK0mckVqzDieUKTT+KGxi+zIpeVsFxymkIiRpbpDziHc290Xr9A1O4Om7otoRA==",
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.1.tgz",
+      "integrity": "sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==",
       "dev": true
     },
     "nise": {
@@ -4869,14 +4869,13 @@
       "dev": true
     },
     "uglify-js": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.5.1.tgz",
-      "integrity": "sha512-kI+3c+KphOAKIikQsZoT2oDsVYH5qvhpTtFObfMCdhPAYnjSvmW4oTWMhvDD4jtAGHJwztlBXQgozGcq3Xw9oQ==",
+      "version": "3.9.3",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.9.3.tgz",
+      "integrity": "sha512-r5ImcL6QyzQGVimQoov3aL2ZScywrOgBXGndbWrdehKoSvGe/RmiE5Jpw/v+GvxODt6l2tpBXwA7n+qZVlHBMA==",
       "dev": true,
       "optional": true,
       "requires": {
-        "commander": "~2.19.0",
-        "source-map": "~0.6.1"
+        "commander": "~2.20.3"
       }
     },
     "ultron": {

build/package.json

@@ -11,7 +11,7 @@
   "contributors": [],
   "dependencies": {},
   "devDependencies": {
-    "handlebars": "^4.1.1",
+    "handlebars": "^4.6.0",
     "jasmine-core": "~2.5.2",
     "jasmine-sinon": "^0.4.0",
     "jsdoc": "^3.5.5",