Bump terser from 4.8.0 to 4.8.1 in /samples/react-calendar-feed

Bumps [terser](https://github.com/terser/terser) from 4.8.0 to 4.8.1.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.8.0...v4.8.1)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

samples/react-calendar-feed/package-lock.json

@@ -14096,8 +14096,7 @@
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       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
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+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
-      "dev": true
     },
     "buffer-indexof": {
       "version": "1.1.1",
@@ -29331,14 +29330,12 @@
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
-          "dev": true
         },
         "source-map-support": {
           "version": "0.5.19",
           "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
           "integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
-          "dev": true,
           "requires": {
             "buffer-from": "^1.0.0",
             "source-map": "^0.6.0"
@@ -29359,17 +29356,6 @@
           "integrity": "sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA==",
           "dev": true
         },
-        "terser": {
-          "version": "4.8.0",
-          "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.0.tgz",
-          "integrity": "sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==",
-          "dev": true,
-          "requires": {
-            "commander": "^2.20.0",
-            "source-map": "~0.6.1",
-            "source-map-support": "~0.5.12"
-          }
-        },
         "terser-webpack-plugin": {
           "version": "1.4.4",
           "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.4.4.tgz",