Bump html-minifier from 3.5.20 to 3.5.21 (#3015)

Bumps [html-minifier](https://github.com/kangax/html-minifier) from 3.5.20 to 3.5.21.
- [Release notes](https://github.com/kangax/html-minifier/releases)
- [Commits](https://github.com/kangax/html-minifier/compare/v3.5.20...v3.5.21

)

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

package-lock.json

@@ -7345,14 +7345,14 @@
 			"integrity": "sha1-DfKTUfByEWNRXfueVUPl9u7VFi8="
 		},
 		"html-minifier": {
-			"version": "3.5.20",
-			"resolved": "https://registry.npmjs.org/html-minifier/-/html-minifier-3.5.20.tgz",
-			"integrity": "sha512-ZmgNLaTp54+HFKkONyLFEfs5dd/ZOtlquKaTnqIWFmx3Av5zG6ZPcV2d0o9XM2fXOTxxIf6eDcwzFFotke/5zA==",
+			"version": "3.5.21",
+			"resolved": "https://registry.npmjs.org/html-minifier/-/html-minifier-3.5.21.tgz",
+			"integrity": "sha512-LKUKwuJDhxNa3uf/LPR/KVjm/l3rBqtYeCOAekvG8F1vItxMUpueGd94i/asDDr8/1u7InxzFA5EeGjhhG5mMA==",
 			"requires": {
 				"camel-case": "3.0.x",
 				"clean-css": "4.2.x",
 				"commander": "2.17.x",
-				"he": "1.1.x",
+				"he": "1.2.x",
 				"param-case": "2.1.x",
 				"relateurl": "0.2.x",
 				"uglify-js": "3.4.x"
@@ -7363,14 +7363,10 @@
 					"resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
 					"integrity": "sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg=="
 				},
-				"uglify-js": {
-					"version": "3.4.9",
-					"resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.9.tgz",
-					"integrity": "sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==",
-					"requires": {
-						"commander": "~2.17.1",
-						"source-map": "~0.6.1"
-					}
+				"he": {
+					"version": "1.2.0",
+					"resolved": "https://registry.npmjs.org/he/-/he-1.2.0.tgz",
+					"integrity": "sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw=="
 				}
 			}
 		},
@@ -16087,6 +16083,22 @@
 				}
 			}
 		},
+		"uglify-js": {
+			"version": "3.4.9",
+			"resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.9.tgz",
+			"integrity": "sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==",
+			"requires": {
+				"commander": "~2.17.1",
+				"source-map": "~0.6.1"
+			},
+			"dependencies": {
+				"commander": {
+					"version": "2.17.1",
+					"resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
+					"integrity": "sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg=="
+				}
+			}
+		},
 		"uglify-to-browserify": {
 			"version": "1.0.2",
 			"resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",

package.json

@@ -129,7 +129,7 @@
 		"gulp-uglify": "3.0.1",
 		"gulp-util": "3.0.8",
 		"hard-source-webpack-plugin": "0.12.0",
-		"html-minifier": "3.5.20",
+		"html-minifier": "3.5.21",
 		"http-signature": "1.2.0",
 		"insert-text-at-cursor": "0.1.1",
 		"is-root": "2.0.0",