Update dependencies

Author: bdukes

package.json

@@ -56,7 +56,7 @@
     "lie": "3.3.0",
     "lightbox2": "2.11.0",
     "moment": "2.24.0",
-    "moment-timezone": "0.4.0",
+    "moment-timezone": "0.5.25",
     "nouislider": "14.0.1",
     "numeral": "2.0.6",
     "pepjs": "0.5.2",
@@ -81,19 +81,19 @@
   },
   "devDependencies": {
     "chalk": "^2.4.2",
-    "cliui": "4.1.0",
+    "cliui": "5.0.0",
     "cross-spawn": "6.0.5",
     "fancy-log": "1.3.3",
     "glob": "^7.1.3",
     "globby": "^9.0.0",
     "gulp": "^4.0.0",
-    "gulp-ejs": "^3.3.0",
-    "gulp-zip": "^4.2.0",
+    "gulp-ejs": "^4.1.1",
+    "gulp-zip": "^5.0.0",
     "lodash": "4.17.11",
-    "merge-stream": "^1.0.1",
+    "merge-stream": "^2.0.0",
     "package-json": "^6.0.0",
-    "semver": "5.6.0",
-    "yeoman-generator": "^3.2.0",
+    "semver": "6.1.1",
+    "yeoman-generator": "^4.0.1",
     "yo": "^2.0.5"
   }
 }