upgrade react, react-scripts, and react-timeago (#252)

Author: peterbe

package.json

@@ -6,12 +6,12 @@
     "bootstrap": "4.6.0",
     "classnames": "2.3.1",
     "ky": "0.25.0",
-    "react": "16.14.0",
+    "react": "17.0.2",
     "react-copy-to-clipboard": "5.0.3",
-    "react-dom": "16.14.0",
+    "react-dom": "17.0.2",
     "react-router-dom": "5.2.0",
-    "react-scripts": "3.4.4",
-    "react-timeago": "5.2.0",
+    "react-scripts": "4.0.3",
+    "react-timeago": "6.1.1",
     "reactstrap": "8.9.0"
   },
   "devDependencies": {
@@ -22,7 +22,7 @@
     "braces": ">=2.3.1",
     "handlebars": ">=4.5.3",
     "js-yaml": ">=3.13.0",
-    "lodash": ">=4.17.12",
+    "lodash": ">=4.17.21",
     "mixin-deep": ">=1.3.2",
     "set-value": ">=2.0.1",
     "eslint-utils": ">=1.4.1",

src/App.css

@@ -44,7 +44,7 @@ a {
 }
 
 td.checked {
-  background: url('/static/check.png') no-repeat;
+  background: url(./static/check.png) no-repeat;
   background-position: center;
 }