Upgrade HAKit to 0.4.2 (#2730)

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## Summary
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importantly what they aim to achieve -->
Depending on HAKit PR and tag:
home-assistant/HAKit#65
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Documentation: home-assistant/companion.home-assistant#

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Podfile

@@ -36,9 +36,9 @@ pod 'XCGLogger'
 
 # Keep Starscream reference even though HAKit already install it, because it defines our fork with the necessary fix
 pod 'Starscream', git: 'https://github.com/bgoncal/starscream', branch: 'ha-URLSession-fix'
-pod 'HAKit', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.1'
-pod 'HAKit/PromiseKit', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.1'
-pod 'HAKit/Mocks', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.1'
+pod 'HAKit', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.2'
+pod 'HAKit/PromiseKit', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.2'
+pod 'HAKit/Mocks', git: 'https://github.com/home-assistant/HAKit.git', tag: '0.4.2'
 
 def test_pods
   pod 'OHHTTPStubs/Swift'