Bump gulp-terser from 1.2.0 to 1.2.1

Bumps [gulp-terser](https://github.com/duan602728596/gulp-terser) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/duan602728596/gulp-terser/releases)
- [Commits](https://github.com/duan602728596/gulp-terser/compare/v1.2.0...v1.2.1)

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

package.json

@@ -31,7 +31,7 @@
     "gulp-run": "^1.7.1",
     "gulp-sass": "^4.0.2",
     "gulp-sourcemaps": "^2.6.5",
-    "gulp-terser": "^1.2.0",
+    "gulp-terser": "^1.2.1",
     "localtunnel": "^2.0.0",
     "lodash": "^4.17.13",
     "lodash.template": "^4.5.0",

yarn.lock

@@ -3545,14 +3545,14 @@ gulp-sourcemaps@^2.6.5:
     strip-bom-string "1.X"
     through2 "2.X"
 
-gulp-terser@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/gulp-terser/-/gulp-terser-1.2.0.tgz#41df2a1d0257d011ba8b05efb2568432ecd0495b"
-  integrity sha512-lf+jE2DALg2w32p0HRiYMlFYRYelKZPNunHp2pZccCYrrdCLOs0ItbZcN63yr2pbz116IyhUG9mD/QbtRO1FKA==
+gulp-terser@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/gulp-terser/-/gulp-terser-1.2.1.tgz#d5b0ee7ebb1107c1a7bb92449629b07a1951b896"
+  integrity sha512-wFWfO6hqPwHbzyulA67ZiC2mFXQO4bPno82cvL/V6qZsFXvYxKeeFuLSNsv+i/POhyfNJLkDrcye4rRxkvJUAA==
   dependencies:
     plugin-error "^1.0.1"
-    terser "^4.0.0"
-    through2 "^3.0.1"
+    terser ">=4"
+    through2 "^4.0.2"
     vinyl-sourcemaps-apply "^0.2.1"
 
 gulp-util@^3.0.0:
@@ -5776,7 +5776,7 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-"readable-stream@2 || 3":
+"readable-stream@2 || 3", readable-stream@3:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
   integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
@@ -6805,7 +6805,7 @@ tempfile@^2.0.0:
     temp-dir "^1.0.0"
     uuid "^3.0.1"
 
-terser@^4.0.0:
+terser@>=4:
   version "4.8.0"
   resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.0.tgz#63056343d7c70bb29f3af665865a46fe03a0df17"
   integrity sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==
@@ -6852,13 +6852,12 @@ through2@3.0.1:
   dependencies:
     readable-stream "2 || 3"
 
-through2@^3.0.1:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/through2/-/through2-3.0.2.tgz#99f88931cfc761ec7678b41d5d7336b5b6a07bf4"
-  integrity sha512-enaDQ4MUyP2W6ZyT6EsMzqBPZaM/avg8iuo+l2d3QCs0J+6RaqkHV/2/lOwDTueBHeJ/2LG9lrLW3d5rWPucuQ==
+through2@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-4.0.2.tgz#a7ce3ac2a7a8b0b966c80e7c49f0484c3b239764"
+  integrity sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==
   dependencies:
-    inherits "^2.0.4"
-    readable-stream "2 || 3"
+    readable-stream "3"
 
 through@^2.3.8:
   version "2.3.8"