rel: Prepare 4.2.0 release (#730)

## Which problem is this PR solving?
Prepares the next release of beeline-nodjs. Includes updating minimum
Node version.

## Short description of the changes
- Update version to 4.2.0 in package.json
- Update minimum node version to 14.18 in package.json & README
- Add changelog entry

CHANGELOG.md

@@ -1,5 +1,16 @@
 # beeline-nodejs changelog
 
+## 4.2.0 [2024-04-26]
+
+### !!! Breaking Changes !!!
+
+Minimum Node version is now 14.18.
+
+### Maintenance
+
+- maint: Bump libhoney to 4.3.0 (#729) | @MikeGoldsmith
+- maint: add labels to release.yml for auto-generated grouping (#728) | @JamieDanielson
+
 ## 4.1.0 [2024-03-07]
 
 ### Enhancements

README.md

@@ -13,7 +13,7 @@ This package makes it easy to instrument your Express/NodeJS application to send
 
 ## Dependencies
 
-- **Node 14+**
+- **Node 14.18+**
 
 ## Known Issues
 

package.json

@@ -6,13 +6,13 @@
     "node": "16.17.0"
   },
   "license": "Apache-2.0",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "repository": {
     "type": "git",
     "url": "https://github.com/honeycombio/beeline-nodejs.git"
   },
   "engines": {
-    "node": ">= 14.*"
+    "node": ">= 14.18"
   },
   "files": [
     "docs",