diff --git a/hello-world/package-lock.json b/hello-world/package-lock.json
index 165cf45..7c420ea 100644
--- a/hello-world/package-lock.json
+++ b/hello-world/package-lock.json
@@ -1122,6 +1122,8 @@
     },
     "@vue/cli-plugin-babel": {
       "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/@vue/cli-plugin-babel/-/cli-plugin-babel-3.8.0.tgz",
+      "integrity": "sha512-VLWvpgDM+HN2FZu1x+r9pisombDTK1k+RPNPeslnwjGjrUXmKNAamXL1ZIsPwsj6k6PpWPN4jetBIMqcBzBu6Q==",
       "dev": true,
       "requires": {
         "@babel/core": "^7.0.0",
@@ -1133,6 +1135,8 @@
     },
     "@vue/cli-plugin-eslint": {
       "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/@vue/cli-plugin-eslint/-/cli-plugin-eslint-3.8.0.tgz",
+      "integrity": "sha512-18LDJmjH0DDw9T4+RbrSVk4xkF8t8RDRsEPJLPurno1YVJodIkQ6lqVu82faVgtvPyCoqiaicoTq/iwi1avoLQ==",
       "dev": true,
       "requires": {
         "@vue/cli-shared-utils": "^3.8.0",
@@ -1750,6 +1754,8 @@
     },
     "@vue/cli-service": {
       "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/@vue/cli-service/-/cli-service-3.8.0.tgz",
+      "integrity": "sha512-ipJF4RHjyLyLC4oLx+JM1Jk6tiIG0KjCFAqfOscQ44K4CdyS03oFMAUR+SZYy/UXKccMnoeY6Ld4YrGXSytQsg==",
       "dev": true,
       "requires": {
         "@intervolga/optimize-cssnano-plugin": "^1.0.5",
@@ -3558,6 +3564,11 @@
         }
       }
     },
+    "core-js": {
+      "version": "2.6.12",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.12.tgz",
+      "integrity": "sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ=="
+    },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -3985,9 +3996,9 @@
       "dev": true
     },
     "decode-uri-component": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.2.tgz",
+      "integrity": "sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ==",
       "dev": true
     },
     "deep-equal": {
@@ -4451,6 +4462,8 @@
     },
     "eslint": {
       "version": "5.16.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.16.0.tgz",
+      "integrity": "sha512-S3Rz11i7c8AA5JPv7xAH+dOyq/Cu/VXHiHXBPOU1k/JAM5dXqQPt3qcrhpHSorXmrpu2g0gkIBVXAqCpzfoZIg==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
@@ -4551,6 +4564,8 @@
     },
     "eslint-plugin-vue": {
       "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-vue/-/eslint-plugin-vue-5.2.2.tgz",
+      "integrity": "sha512-CtGWH7IB0DA6BZOwcV9w9q3Ri6Yuo8qMjx05SmOGJ6X6E0Yo3y9E/gQ5tuNxg2dEt30tRnBoFTbvtmW9iEoyHA==",
       "dev": true,
       "requires": {
         "vue-eslint-parser": "^5.0.0"
@@ -10783,7 +10798,9 @@
       }
     },
     "vue": {
-      "version": "2.6.10"
+      "version": "2.6.10",
+      "resolved": "https://registry.npmjs.org/vue/-/vue-2.6.10.tgz",
+      "integrity": "sha512-ImThpeNU9HbdZL3utgMCq0oiMzAkt1mcgy3/E6zWC/G6AaQoeuFdsl9nDhTDU3X1R6FK7nsIUuRACVcjI+A2GQ=="
     },
     "vue-eslint-parser": {
       "version": "5.0.0",
@@ -10857,6 +10874,8 @@
     },
     "vue-template-compiler": {
       "version": "2.6.10",
+      "resolved": "https://registry.npmjs.org/vue-template-compiler/-/vue-template-compiler-2.6.10.tgz",
+      "integrity": "sha512-jVZkw4/I/HT5ZMvRnhv78okGusqe0+qH2A0Em0Cp8aq78+NK9TII263CDVz2QXZsIT+yyV/gZc/j/vlwa+Epyg==",
       "dev": true,
       "requires": {
         "de-indent": "^1.0.2",
diff --git a/hello-world/yarn.lock b/hello-world/yarn.lock
index 58fa20d..bf35e2e 100644
--- a/hello-world/yarn.lock
+++ b/hello-world/yarn.lock
@@ -2591,9 +2591,9 @@ decamelize@^1.2.0:
   integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
 
 decode-uri-component@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
-  integrity sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.2.tgz#e69dbe25d37941171dd540e024c444cd5188e1e9"
+  integrity sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ==
 
 deep-equal@^1.0.1:
   version "1.0.1"
@@ -7790,6 +7790,11 @@ vue-hot-reload-api@^2.3.0:
   resolved "https://registry.yarnpkg.com/vue-hot-reload-api/-/vue-hot-reload-api-2.3.3.tgz#2756f46cb3258054c5f4723de8ae7e87302a1ccf"
   integrity sha512-KmvZVtmM26BQOMK1rwUZsrqxEGeKiYSZGA7SNWE6uExx8UX/cj9hq2MRV/wWC3Cq6AoeDGk57rL9YMFRel/q+g==
 
+vue-js-toggle-button@^1.3.2:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/vue-js-toggle-button/-/vue-js-toggle-button-1.3.3.tgz#d603089039e41d45e607355ad2e0478c6a52aceb"
+  integrity sha512-0b920oztgK+1SqlYF26MPiT28hAieL5aAQE7u21XEym5ryfzD4EMer4hLkgDC/1sWsCHb22GvV+t1Kb4AI6QFw==
+
 vue-loader@^15.7.0:
   version "15.7.0"
   resolved "https://registry.yarnpkg.com/vue-loader/-/vue-loader-15.7.0.tgz#27275aa5a3ef4958c5379c006dd1436ad04b25b3"