Hotfix/sbc 73 (#2)

* Update gitignore

* Add staking export

Author: ThibaultJRD

.gitignore

@@ -107,4 +107,7 @@ dist
 /build
 
 # Proto files
-/proto
+/proto
+
+# IDE
+.idea

src/messages/index.ts

@@ -1,3 +1,4 @@
 export * from './Message';
 export * from './bank';
 export * from './distribution';
+export * from './staking';