add comment

package-lock.json

@@ -8,7 +8,9 @@
       "name": "vue_cli",
       "version": "0.1.0",
       "dependencies": {
+        "@babel/polyfill": "^7.12.1",
         "axios": "^0.19.2",
+        "caniuse-lite": "^1.0.30001769",
         "chart.js": "^3.9.1",
         "chartjs-adapter-moment": "^1.0.1",
         "chartjs-plugin-datalabels": "^2.2.0",
@@ -1118,6 +1120,23 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/polyfill": {
+      "version": "7.12.1",
+      "resolved": "https://registry.npmjs.org/@babel/polyfill/-/polyfill-7.12.1.tgz",
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+      "deprecated": "🚨 This package has been deprecated in favor of separate inclusion of a polyfill and regenerator-runtime (when needed). See the @babel/polyfill docs (https://babeljs.io/docs/en/babel-polyfill) for more information.",
+      "dependencies": {
+        "core-js": "^2.6.5",
+        "regenerator-runtime": "^0.13.4"
+      }
+    },
+    "node_modules/@babel/polyfill/node_modules/core-js": {
+      "version": "2.6.12",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.12.tgz",
+      "integrity": "sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ==",
+      "deprecated": "core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.",
+      "hasInstallScript": true
+    },
     "node_modules/@babel/preset-env": {
       "version": "7.9.6",
       "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.9.6.tgz",
@@ -3660,10 +3679,9 @@
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-      "dev": true,
+      "version": "1.0.30001769",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001769.tgz",
+      "integrity": "sha512-BCfFL1sHijQlBGWBMuJyhZUhzo7wer5sVj9hqekB/7xn0Ypy+pER/edCYQm4exbXj4WiySGp40P8UuTh6w1srg==",
       "funding": [
         {
           "type": "opencollective",
@@ -7180,12 +7198,6 @@
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       "dev": true
     },
-    "node_modules/highcharts": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/highcharts/-/highcharts-6.2.0.tgz",
-      "integrity": "sha512-A4E89MA+kto8giic7zyLU6ZxfXnVeCUlKOyzFsah3+n4BROx4bgonl92KIBtwLud/mIWir8ahqhuhe2by9LakQ==",
-      "peer": true
-    },
     "node_modules/highlight.js": {
       "version": "10.7.3",
       "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.7.3.tgz",
@@ -11128,8 +11140,7 @@
     "node_modules/regenerator-runtime": {
       "version": "0.13.5",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz",
-      "integrity": "sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA==",
-      "dev": true
+      "integrity": "sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA=="
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     "node_modules/regenerator-transform": {
       "version": "0.14.4",