prepare 3.4.0 release (#300)

## [3.4.0] - 2024-06-20
### Changed:
- Updated to launchdarkly-js-sdk-common 5.3.0 which supports synchronous
inspectors.

---------

Co-authored-by: Matthew M. Keeler <[email protected]>
Co-authored-by: LaunchDarklyReleaseBot <[email protected]>
Co-authored-by: Ryan Lamb <[email protected]>

Author: 4 people

package.json

@@ -77,7 +77,7 @@
   },
   "dependencies": {
     "escape-string-regexp": "^4.0.0",
-    "launchdarkly-js-sdk-common": "5.2.0"
+    "launchdarkly-js-sdk-common": "5.3.0"
   },
   "repository": {
     "type": "git",