Added BugsnagPlugin.h to podspec

BugsnagReactNative.podspec

@@ -21,7 +21,9 @@ Pod::Spec.new do |s|
   s.source_files = 'cocoa/BugsnagReactNative.{h,m}',
                    'cocoa/vendor/bugsnag-cocoa/Source/**/*.{h,m,mm,cpp,c}',
 
-  s.public_header_files = 'cocoa/**/{Bugsnag,BugsnagReactNative,BugsnagMetaData,BugsnagConfiguration,BugsnagBreadcrumb,BugsnagCrashReport,BSG_KSCrashReportWriter}.h'
+  s.public_header_files = 'cocoa/**/BugsnagReactNative.h' + 
+                          'cocoa/**/BSG_KSCrashReportWriter.h,' + 
+                          'cocoa/**/Bugsnag{,MetaData,Configuration,Breadcrumb,CrashReport,Plugin}.h'
 
   # If Bugsnag is previously installed via CocoaPods, use the Core subspec.
   s.subspec 'Core' do |core|

CHANGELOG.md

@@ -1,6 +1,13 @@
 Changelog
 =========
 
+## 2.23.7 (TBC)
+
+### Bug fixes
+
+* Add missing `BugsnagPlugin.h` header to podspec file
+  [#450](https://github.com/bugsnag/bugsnag-react-native/pull/450)
+
 ## 2.23.6 (2020-02-10)
 
 ### Bug fixes

CONTRIBUTING.md

@@ -99,6 +99,8 @@ make ANDROID_VERSION=X IOS_VERSION=X upgrade_vendor
 ```
 
 - Upgrade TypeScript definitions if the JavaScript has changed.
+- Update `BugsnagReactNative.podspec` if the public headers have changed inside
+  bugsnag-cocoa's own podspec.
 
 ### Release Checklist