Cannot run examples

[scheung38]

#688

It is similar to the above issue, and have npm install --save history but still

$ npm start
bootstrap-table
> gulp example-server

[16:40:56] Using gulpfile ~/WebstormProjects/react-bootstrap-table/gulpfile.js
[16:40:56] Starting 'example-server'...
[16:40:56] Finished 'example-server' after 70 ms
Listening at localhost:3004
Time: 34221ms
        Asset     Size  Chunks       Chunk Names
app.bundle.js  7.49 MB       0       app
   vendors.js   666 kB       1       vendors
chunk    {0} app.bundle.js (app) 3.05 MB {1} [rendered]
chunk    {1} vendors.js (vendors) 224 kB [rendered]

ERROR in ./src/BootstrapTable.js

$USER/WebstormProjects/react-bootstrap-table/src/BootstrapTable.js
  895:5   error  Expected { after 'if' condition  curly
  895:10  error  "_this" is not defined           no-undef

✖ 2 problems (2 errors, 0 warnings)

webpack: bundle is now VALID.

[AllenFang]

@scheung38, Fixed on v2.5.6 :)