Updated packages and add yarn.lock

package-lock.json

@@ -515,6 +515,15 @@
         "readdirp": "2.1.0"
       }
     },
+    "clean-css": {
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.1.9.tgz",
+      "integrity": "sha1-Nc7ornaHpJuYA09w3gDE7dOCYwE=",
+      "dev": true,
+      "requires": {
+        "source-map": "0.5.7"
+      }
+    },
     "cliui": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
@@ -1911,6 +1920,18 @@
         "stream-array": "0.1.3"
       }
     },
+    "gulp-clean-css": {
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/gulp-clean-css/-/gulp-clean-css-3.9.0.tgz",
+      "integrity": "sha512-CsqaSO2ZTMQI/WwbWloZWBudhsRMKgxBthzxt4bbcbWrjOY4pRFziyK9IH6YbTpaWAPKEwWpopPkpiAEoDofxw==",
+      "dev": true,
+      "requires": {
+        "clean-css": "4.1.9",
+        "gulp-util": "3.0.8",
+        "through2": "2.0.3",
+        "vinyl-sourcemaps-apply": "0.2.1"
+      }
+    },
     "gulp-connect": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/gulp-connect/-/gulp-connect-5.0.0.tgz",
@@ -1956,6 +1977,12 @@
         "through2": "2.0.3"
       }
     },
+    "gulp-rename": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/gulp-rename/-/gulp-rename-1.2.2.tgz",
+      "integrity": "sha1-OtRCh2PwXidk3sHGfYaNsnVoeBc=",
+      "dev": true
+    },
     "gulp-util": {
       "version": "3.0.8",
       "resolved": "https://registry.npmjs.org/gulp-util/-/gulp-util-3.0.8.tgz",
@@ -3402,6 +3429,7 @@
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       "dev": true,
       "requires": {
+        "JSONStream": "1.3.1",
         "abbrev": "1.1.0",
         "ansi-regex": "3.0.0",
         "ansicolors": "0.3.2",
@@ -3433,7 +3461,6 @@
         "inherits": "2.0.3",
         "ini": "1.3.4",
         "init-package-json": "1.10.1",
-        "JSONStream": "1.3.1",
         "lazy-property": "1.0.0",
         "libnpx": "9.2.0",
         "lockfile": "1.0.3",
@@ -3501,6 +3528,27 @@
         "write-file-atomic": "2.1.0"
       },
       "dependencies": {
+        "JSONStream": {
+          "version": "1.3.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "jsonparse": "1.3.1",
+            "through": "2.3.8"
+          },
+          "dependencies": {
+            "jsonparse": {
+              "version": "1.3.1",
+              "bundled": true,
+              "dev": true
+            },
+            "through": {
+              "version": "2.3.8",
+              "bundled": true,
+              "dev": true
+            }
+          }
+        },
         "abbrev": {
           "version": "1.1.0",
           "bundled": true,
@@ -3912,27 +3960,6 @@
             }
           }
         },
-        "JSONStream": {
-          "version": "1.3.1",
-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "jsonparse": "1.3.1",
-            "through": "2.3.8"
-          },
-          "dependencies": {
-            "jsonparse": {
-              "version": "1.3.1",
-              "bundled": true,
-              "dev": true
-            },
-            "through": {
-              "version": "2.3.8",
-              "bundled": true,
-              "dev": true
-            }
-          }
-        },
         "lazy-property": {
           "version": "1.0.0",
           "bundled": true,
@@ -7934,12 +7961,6 @@
       "integrity": "sha1-wMRFXlTOWhecqHNuczNLTn/WdVM=",
       "dev": true
     },
-    "string_decoder": {
-      "version": "0.10.31",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
-      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
-      "dev": true
-    },
     "string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -7951,6 +7972,12 @@
         "strip-ansi": "3.0.1"
       }
     },
+    "string_decoder": {
+      "version": "0.10.31",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+      "dev": true
+    },
     "stringstream": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",