Bump uglify-js from 3.14.5 to 3.15.0

Bumps [uglify-js](https://github.com/mishoo/UglifyJS) from 3.14.5 to 3.15.0.
- [Release notes](https://github.com/mishoo/UglifyJS/releases)
- [Commits](https://github.com/mishoo/UglifyJS/compare/v3.14.5...v3.15.0)

---
updated-dependencies:
- dependency-name: uglify-js
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "cryptalk",
-  "version": "1.2.5",
+  "version": "1.2.6",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "cryptalk",
-      "version": "1.2.5",
+      "version": "1.2.6",
       "license": "MIT",
       "os": [
         "darwin",
@@ -1900,9 +1900,9 @@
       }
     },
     "node_modules/uglify-js": {
-      "version": "3.14.5",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.14.5.tgz",
-      "integrity": "sha512-qZukoSxOG0urUTvjc2ERMTcAy+BiFh3weWAkeurLwjrCba73poHmG3E36XEjd/JGukMzwTL7uCxZiAexj8ppvQ==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.15.0.tgz",
+      "integrity": "sha512-x+xdeDWq7FiORDvyIJ0q/waWd4PhjBNOm5dQUOq2AKC0IEjxOS66Ha9tctiVDGcRQuh69K7fgU5oRuTK4cysSg==",
       "dev": true,
       "bin": {
         "uglifyjs": "bin/uglifyjs"
@@ -3454,9 +3454,9 @@
       "integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ=="
     },
     "uglify-js": {
-      "version": "3.14.5",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.14.5.tgz",
-      "integrity": "sha512-qZukoSxOG0urUTvjc2ERMTcAy+BiFh3weWAkeurLwjrCba73poHmG3E36XEjd/JGukMzwTL7uCxZiAexj8ppvQ==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.15.0.tgz",
+      "integrity": "sha512-x+xdeDWq7FiORDvyIJ0q/waWd4PhjBNOm5dQUOq2AKC0IEjxOS66Ha9tctiVDGcRQuh69K7fgU5oRuTK4cysSg==",
       "dev": true
     },
     "update-check": {