[wakelock] add macOS Podspec (#111)

* Create wakelock.podspec

* Update CHANGELOG.md

* Update pubspec.yaml

+## 0.5.1+1
+
+* Added Podspec to the `wakelock` package to avoid build issues on macOS.
+
 ## 0.5.1
 
 * Resolved a crash on iOS which was caused by 2 observers on idleTimerDisabled.

+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
+#
+Pod::Spec.new do |s|
+  s.name             = 'wakelock'
+  s.version          = '0.0.1'
+  s.summary          = 'No-op implementation of the macos wakelock plugin to avoid build issues on macos'
+  s.description      = <<-DESC
+  No-op implementation of the wakelock plugin to avoid build issues on macos.
+  https://github.com/flutter/flutter/issues/46618
+                       DESC
+  s.homepage         = 'https://github.com/creativecreatorormaybenot/wakelock'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'creativecreatorormaybenot' => 'creativecreatorormaybenot@gmail.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.public_header_files = 'Classes/**/*.h'
+
+  s.platform = :osx
+  s.osx.deployment_target = '10.11'
+end

@@ -2,7 +2,7 @@ name: wakelock
 description: >-2
   Plugin that allows you to keep the device screen awake, i.e. prevent the screen from sleeping on
   Android, iOS, macOS, Windows, and web.
-version: 0.5.1
+version: 0.5.1+1
 homepage: https://github.com/creativecreatorormaybenot/wakelock/tree/master/wakelock
 
 environment: