Release V2.1.1

Sebastiaan:Update react-native-fcm and FirebaseMessaging pod for iOS
Luuk Scholten:Perform tests in ci
Luuk Scholten:Add dependencies for saga testing
Luuk Scholten:Add example event saga test
Gijs Hendriksen:Remove spaces in url parameters
Sebastiaan:Add GitLab issue and merge request template
Sebastiaan:Fix iOS styling renderering of elements
Sebastiaan:Update React-Native-SnackBar-Component to fix bug
Sebastiaan:Fix iOS top padding on Welcome screen
Sebastiaan:Stop using <Image> tag in favour of <ImageBackground>
Wietse Kuipers:Version bump for release
Sebastiaan:Fix profile borders on Android
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