update package info for 0.2.1

setup.py

@@ -13,11 +13,14 @@
 
 # Package meta-data.
 NAME = 'pygmtools'
-DESCRIPTION = 'Preprocess dataset, fetch data and evaluate prediction result for graph matching on several datasets, including PascalVOC, WillowObject, CUB2011, IMC-PT-SparseGM and SPair71k.'
+DESCRIPTION = 'pygmtools provides graph matching solvers in Python and supports various computational backends: ' \
+              'numpy and pytorch. ' \
+              'pygmtools also provides API for preprocessing dataset, fetching data and evaluating prediction result for' \
+              ' graph matching on several datasets, including PascalVOC, WillowObject, CUB2011, IMC-PT-SparseGM and SPair71k.'
 URL = 'https://github.com/Thinklab-SJTU/pygmtools'
 EMAIL = '1115712590@sjtu.edu.cn'
 AUTHOR = 'Ziao Guo'
-VERSION = '0.2.0'
+VERSION = '0.2.1'
 
 REQUIRED = [
      'requests>=2.25.1', 'scipy>=1.4.1', 'Pillow>=7.2.0', 'numpy>=1.18.5', 'easydict>=1.7',