fix east post process of dygraph (#9099)

* support min_area_rect crop

* add check_install

* fix requirement.txt

* fix check_install

* add lanms-neo for drrg

* fix

* fix doc

* fix

* support set gpu_id when inference

* fix #8855

* fix #8855

* opt slim doc

* fix doc bug

* fix east postprocess

ppocr/postprocess/east_postprocess.py

@@ -81,6 +81,7 @@ class EASTPostProcess(object):
         try:
             check_install('lanms', 'lanms-nova')
             import lanms
+            boxes = lanms.merge_quadrangle_n9(boxes, nms_thresh)
         except:
             print(
                 'You should install lanms by pip3 install lanms-nova to speed up nms_locality'