[Security - dev] Bump handlebars from 4.1.2 to 4.7.3 (#235)

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.1.2 to 4.7.3. **This update includes a security fix.**
- [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@v4.1.2...v4.7.3)

NOTES from @brodybits:

This is a workaround solution until this project is ready to use Jest 25 as proposed in PR #240.

This seems to be the equivalent to adding Yarn resolutions as follows
(then removing after Yarn update):

diff --git a/package.json b/package.json
index 59ab6c9..5b31113 100644
--- a/package.json
+++ b/package.json
@@ -63,5 +63,9 @@
     "eslint-plugin-standard": "^4.0.1",
     "jest": "^24.9.0",
     "recursive-readdir": "^2.2.2"
+  },
+  "resolutions": {
+    "handlebars": "4.7.3",
+    "uglify-js": "^3.7.7"
   }
 }

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: @brodybits (Christopher J. Brody) <chris.brody+brodybits@gmail.com>

yarn.lock

@@ -958,10 +958,10 @@ commander@^3.0.1, commander@~3.0.1:
   resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.2.tgz#6837c3fb677ad9933d1cfba42dd14d5117d6b39e"
   integrity sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==
 
-commander@~2.20.0:
-  version "2.20.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
-  integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
 
 component-emitter@^1.2.1:
   version "1.3.0"
@@ -1859,9 +1859,9 @@ growly@^1.3.0:
   integrity sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=
 
 handlebars@^4.1.2:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.2.tgz#b6b37c1ced0306b221e094fc7aca3ec23b131b67"
-  integrity sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==
+  version "4.7.3"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.3.tgz#8ece2797826886cf8082d1726ff21d2a022550ee"
+  integrity sha512-SRGwSYuNfx8DwHD/6InAPzD6RgeruWLT+B8e8a7gGs8FWgHzlExpTFMEq2IA6QpAfOClpKHy6+8IqTjeBCu6Kg==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"
@@ -4590,11 +4590,11 @@ typed-rest-client@~1.5.0:
     underscore "1.8.3"
 
 uglify-js@^3.1.4:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.6.0.tgz#704681345c53a8b2079fb6cec294b05ead242ff5"
-  integrity sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==
+  version "3.7.7"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.7.tgz#21e52c7dccda80a53bf7cde69628a7e511aec9c9"
+  integrity sha512-FeSU+hi7ULYy6mn8PKio/tXsdSXN35lm4KgV2asx00kzrLU9Pi3oAslcJT70Jdj7PHX29gGUPOT6+lXGBbemhA==
   dependencies:
-    commander "~2.20.0"
+    commander "~2.20.3"
     source-map "~0.6.1"
 
 underscore@1.8.3: