Analytics.trackEvent doesn't allow message with no props

[raymondchooi]

Expected behaviour

Analytics.trackEvent("Log in successful."); should run without errors

Actual behaviour

Error:
undefined is not an object (evaluating 'Object.keys(props)')
in Analytics.js:26:16

Steps to reproduce

• Add analytics following https://docs.microsoft.com/en-us/appcenter/sdk/analytics/react-native
• Track an event with just a message, e.g.
  Analytics.trackEvent("Log in successful.");

Possible solution

Add default props to equal null and add early break in Analytics.js:20:

function sanitizeProperties(props = null) {
    if(props === null) {
        return {};
    }
....

[dhei]

@raymondchooi thanks for reporting.👍
We will fix this in our next release.