Update dependency uglify-js to v3.6.6

Author: renovate-bot

package.json

@@ -22,7 +22,7 @@
   "author": "Tiaan du Plessis",
   "devDependencies": {
     "standard": "12.0.1",
-    "uglify-js": "3.4.0"
+    "uglify-js": "3.6.6"
   },
   "standard": {
     "env": {

yarn.lock

@@ -156,9 +156,10 @@ color-name@^1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
 
-commander@~2.15.0:
-  version "2.15.1"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
+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==
 
 [email protected]:
   version "0.0.1"
@@ -1213,12 +1214,12 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-uglify-js@3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.0.tgz#796762282b5b5f0eafe7d5c8c708d1d7bd5ba11d"
-  integrity sha512-Jcf5naPkX3rVPSQpRn9Vm6Rr572I1gTtR9LnqKgXjmOgfYQ/QS0V2WRStFR53Bdj520M66aCZqt9uzYXgtGrJQ==
+uglify-js@3.6.6:
+  version "3.6.6"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.6.6.tgz#7ec28c92c7131c6a096b69cd48722600cc534207"
+  integrity sha512-q3Zusqd028P8MdbarqL0I1snTZ7+IbIWiKUXVZyXMVdOSxOG2FFqLXyGlgYSqYu46SR7tR3Sk0xqN1VtvxGWnQ==
   dependencies:
-    commander "~2.15.0"
+    commander "~2.20.3"
     source-map "~0.6.1"
 
 uniq@^1.0.1: