README.md: Swift version table

Author: greenrobot

README.md

@@ -33,8 +33,6 @@ To install the `ObjectBox` pod, add the following line to your Podfile:
   pod 'ObjectBox'
 ```
 
-*Note:* ObjectBox 1.3 was built using Swift 5.2. ObjectBox 1.2 works with Swift 5.1 but we highly recommend the update.
-  
 Then run this to install the ObjectBox framework:
 
 ```bash
@@ -69,6 +67,18 @@ If `pod install` fails, try updating CocoaPods first:
 
     gem update xcodeproj && gem update cocoapods && pod repo update
 
+### Swift versions
+
+Here's a list of ObjectBox releases, and the Swift versions they were compiled with:
+
+| ObjectBox version(s) | Swift version |
+|:--------------------:|:-------------:|
+|        1.4.1         |      5.3      |        
+|      1.3, 1.4.0      |      5.2      |        
+|         1.2          |      5.1      |
+
+This might be relevant, e.g. when using Carthage. For various reasons, we recommend using the latest version.
+
 <a name="example"></a>Example
 -----------------------------
 In the [Example](Example/) directory, you'll find a "Notes" example app demonstrating ObjectBox's Swift API.