Prepare and release v2.0.0-beta01 (#91)

1. Update version name in config
2. Add changelog to readme and update version name

Author: DevAhamed

README.md

@@ -75,7 +75,7 @@ The library is available via JCenter. JCenter is the default maven repository us
 
 ```gradle
 dependencies {
-    implementation 'dev.ahamed.mva2:adapter:2.0.0-alpha02'
+    implementation 'dev.ahamed.mva2:adapter:2.0.0-beta01'
 }
 ```
 
@@ -85,9 +85,9 @@ dependencies {
 
 ```gradle
 dependencies {
-    implementation 'dev.ahamed.mva2:ext-databinding:2.0.0-alpha02'  // DataBinding
-    implementation 'dev.ahamed.mva2:ext-decorator:2.0.0-alpha02'    // Decorators
-    implementation 'dev.ahamed.mva2:ext-diffutil-rx:2.0.0-alpha02'  // RxDiffUtil
+    implementation 'dev.ahamed.mva2:ext-databinding:2.0.0-beta01'  // DataBinding
+    implementation 'dev.ahamed.mva2:ext-decorator:2.0.0-beta01'    // Decorators
+    implementation 'dev.ahamed.mva2:ext-diffutil-rx:2.0.0-beta01'  // RxDiffUtil
 }
 ```
 
@@ -427,6 +427,26 @@ The library allows you to draw decoration for individual items or sections. You
 
 ## Changelog
 
+### v2.0.0-beta01
+
+|Type|Stability|Date|
+|---|---|---|
+|Major|Beta|3-July-2019|
+
+All public API's are finalized for v2.0.0 release, only bug fixes will be added in further beta's.
+
+#### Features added
+
+* Added ``OnItemClickListener`` method inside the ItemSection class.
+
+#### Bug fixes
+
+* Fixed NPE thrown by ItemSection when the item is null and expansion/selection is toggled.
+
+#### Behavior Changes
+
+* HeaderSection is has been changed to host ItemSection and NestedSection. Previously it was hosting ItemSection and ListSection.
+
 ### v2.0.0-alpha02
 
 |Type|Stability|Date|

buildSrc/src/main/java/gradle/Config.java

@@ -24,7 +24,7 @@ public interface Config {
 
   String VERSION = "2.0.0";
   String APP_VERSION = VERSION + ".1";
-  String PRODUCTION_VERSION = VERSION + "-alpha02";
+  String PRODUCTION_VERSION = VERSION + "-beta01";
   String SNAPSHOT_VERSION = VERSION + "-SNAPSHOT";
   int VERSION_CODE = 210200002;