fix(DataTable): cells type.

src/common/cellTypes.js

@@ -0,0 +1,7 @@
+
+
+export const CellType = {
+  Text: 'text',
+  Field: 'field',
+  Button: 'button'
+}

src/common/index.js

@@ -1,4 +1,5 @@
 export * from './TableStyle';
 export * from './features';
+export * from './cellTypes';
 
 export const Align = { Left: 'left', Right: 'right', Center: 'center' };