Avoid use of require() in default-config.tsx (jaegertracing#1225)

## Which problem is this PR solving?
- Split from jaegertracing#1212

## Short description of the changes
This needs to be an import for an eventual build system switch, since
Vite uses ES modules. It also helps make things more consistent.

The UI package version in the About Jaeger dropdown still shows up.

---------

Signed-off-by: Máté Szabó <mszabo@fandom.com>

packages/jaeger-ui/src/constants/default-config.tsx

@@ -17,7 +17,7 @@ import deepFreeze from 'deep-freeze';
 import { FALLBACK_DAG_MAX_NUM_SERVICES } from './index';
 import getVersion from '../utils/version/get-version';
 
-const { version } = require('../../package.json');
+import { version } from '../../package.json';
 
 export default deepFreeze(
   Object.defineProperty(

packages/jaeger-ui/tsconfig.lint.json

@@ -52,6 +52,7 @@
     "src/selectors/trace.js",
     "src/utils/configure-store.js",
     "src/utils/sort.js",
-    "src/utils/TreeNode.js"
+    "src/utils/TreeNode.js",
+    "package.json"
   ]
 }