Bump to 5.0.1

Add mention to add java 8 to readme

Author: irgendeinich

README.md

@@ -248,7 +248,7 @@ editableAnnotationTypes: ["Ink", "Highlight"];
 - Android SDK
 - Android Build Tools 23.0.1 (React Native)
 - Android Build Tools 28.0.3 (PSPDFKit module)
-- PSPDFKit >= 5.0.0
+- PSPDFKit >= 5.0.1
 - react-native >= 0.55.4
 
 #### Getting Started
@@ -287,7 +287,7 @@ Let's create a simple app that integrates PSPDFKit and uses the react-native-psp
   }
 ```
 
-8. PSPDFKit targets modern platforms, so you'll have to update `compileSdkVersion` to at least API 28 and `targetSdkVersion` to at least API 26 and enable MultiDex. In `YourApp/android/app/build.gradle` (note **five** places to edit):
+8. PSPDFKit targets modern platforms, so you'll have to update `compileSdkVersion` to at least API 28 and `targetSdkVersion` to at least API 26 and enable MultiDex. You also need to enable Java 8 support. In `YourApp/android/app/build.gradle` (note **six** places to edit):
 
    ```diff
    ...
@@ -310,6 +310,11 @@ Let's create a simple app that integrates PSPDFKit and uses the react-native-psp
            abiFilters "armeabi-v7a", "x86"
        }
    }
+
+   compileOptions {
+   +   sourceCompatibility JavaVersion.VERSION_1_8
+   +   targetCompatibility JavaVersion.VERSION_1_8
+   }
    ...
    ```
 

android/build.gradle

@@ -2,7 +2,7 @@
 *   Contains gradle configuration constants
 */
 ext {
-    PSPDFKIT_VERSION = '5.0.0'
+    PSPDFKIT_VERSION = '5.0.1'
 }
 
 buildscript {