Use a new Step value for Enter WPCOM email screen

WordPressAuthenticator.podspec

@@ -2,7 +2,7 @@
 
 Pod::Spec.new do |s|
   s.name          = 'WordPressAuthenticator'
-  s.version       = '2.4.0-beta.1'
+  s.version       = '2.4.0-beta.2'
 
   s.summary       = 'WordPressAuthenticator implements an easy and elegant way to authenticate your WordPress Apps.'
   s.description   = <<-DESC

WordPressAuthenticator/Analytics/AuthenticatorAnalyticsTracker.swift

@@ -112,6 +112,10 @@ public class AuthenticatorAnalyticsTracker {
         /// This represents the user opening their mail. It’s not strictly speaking an in-app screen but for the user it is part of the flow.
         case emailOpened = "email_opened"
 
+        /// Represents the screen or step in which WPCOM account email is entered by the user
+        ///
+        case enterEmailAddress = "enter_email_address"
+
         /// The screen with a username and password visible
         ///
         case usernamePassword = "username_password"

WordPressAuthenticator/Unified Auth/View Related/Get Started/GetStartedViewController.swift

@@ -452,9 +452,9 @@ private extension GetStartedViewController {
         }
 
         if isMovingToParent {
-            tracker.track(step: .start)
+            tracker.track(step: .enterEmailAddress)
         } else {
-            tracker.set(step: .start)
+            tracker.set(step: .enterEmailAddress)
         }
     }
 }