feat: add excel data export

^--^  ^------------^
|     |
|     +-> package file-saver
|     +-> package xlsx
|    +-> new components (ExcelColumn, ExcelSheet and ExcelFile)
|
+------------------->

Author: securedeveloper

.babelrc

@@ -1,3 +1,4 @@
 {
-    "presets": ["es2015", "react"]
+    "presets": ["es2015", "react"],
+    "plugins": ["transform-class-properties"]
 }