Update devDependencies. (#29381)

package.json

@@ -98,10 +98,10 @@
     "popper.js": "^1.15.0"
   },
   "devDependencies": {
-    "@babel/cli": "^7.5.5",
-    "@babel/core": "^7.5.5",
+    "@babel/cli": "^7.6.0",
+    "@babel/core": "^7.6.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.5.5",
-    "@babel/preset-env": "^7.5.5",
+    "@babel/preset-env": "^7.6.0",
     "autoprefixer": "^9.6.1",
     "babel-eslint": "^10.0.3",
     "babel-plugin-istanbul": "^5.2.0",
@@ -116,7 +116,7 @@
     "find-unused-sass-variables": "^0.5.0",
     "glob": "^7.1.4",
     "hammer-simulator": "0.0.1",
-    "hugo-bin": "^0.46.0",
+    "hugo-bin": "^0.46.2",
     "ip": "^1.1.5",
     "jasmine-core": "^3.4.0",
     "karma": "^4.3.0",
@@ -134,7 +134,7 @@
     "npm-run-all": "^4.1.5",
     "popper.js": "^1.15.0",
     "postcss-cli": "^6.1.3",
-    "rollup": "^1.20.3",
+    "rollup": "^1.21.2",
     "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-istanbul": "^2.0.1",
     "rollup-plugin-node-resolve": "^5.2.0",
@@ -143,7 +143,7 @@
     "shx": "^0.3.2",
     "stylelint": "^10.1.0",
     "stylelint-config-twbs-bootstrap": "^0.4.0",
-    "terser": "^4.2.1",
+    "terser": "^4.3.1",
     "vnu-jar": "19.9.4"
   },
   "engines": {