fix: update less to version ^3.0.0 (#611)

Author: renovate[bot]

package.json

@@ -36,7 +36,7 @@
     "fs-extra": "^5.0.0",
     "glob": "^7.1.2",
     "injection-js": "^2.2.1",
-    "less": "^2.7.2",
+    "less": "^3.0.0",
     "node-sass": "^4.5.3",
     "node-sass-tilde-importer": "^1.0.0",
     "postcss": "^6.0.2",

yarn.lock

@@ -2107,14 +2107,14 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
-less@^2.7.2:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/less/-/less-2.7.3.tgz#cc1260f51c900a9ec0d91fb6998139e02507b63b"
+less@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/less/-/less-3.0.1.tgz#ba2fea24a5632ccb8c84230d6043c0bf91855e37"
   optionalDependencies:
     errno "^0.1.1"
     graceful-fs "^4.1.2"
     image-size "~0.5.0"
-    mime "^1.2.11"
+    mime "^1.4.1"
     mkdirp "^0.5.0"
     promise "^7.1.1"
     request "2.81.0"
@@ -2356,7 +2356,7 @@ mime-types@^2.1.12, mime-types@~2.1.7:
   dependencies:
     mime-db "~1.30.0"
 
-mime@^1.2.11, mime@^1.4.1:
+mime@^1.4.1:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"