[Feature]: add method getDouble to Config

[robingenz]

Description

There is currently no way to get a configuration value of type Double.

Platforms

• iOS
• Android
• Web

Request or proposed solution

Add a new method getDouble to PluginConfig.swift:

@objc public func getDouble(_ configKey: String, _ defaultValue: Double) -> Double {
    if let val = (self.config)[keyPath: KeyPath(configKey)] as? Double {
        return val
    }
    return defaultValue
}

Alternatives

No response

Additional Information

No response

[jcesarmobile]

If this feature is added should be added for both iOS and Android.

For your linked PR, I don't think you need a getDouble anyway since the config value is an integer and you get it as an integer on Android side, so it's better to cast it as you did rather than use a getDouble method to get an integer.

[robingenz]

I've created a PR for Android and iOS: #7638