Update requirements

requirements.txt

-pre-commit
-protobuf >= 3.6.0
-yapf == 0.26.0
-six >= 1.10.0
-flask >= 1.1.0
-flake8
-visualdl
-cma >= 2.7.0
-sentencepiece
+colorama
 colorlog
-tqdm
-nltk
-pyzmq
-gitpython
 easydict
-
-# pandas no longer support python2 in version 0.25 and above
-pandas ; python_version >= "3"
-
+filelock
+flask >= 1.1.0
+gitpython
+numpy
+matplotlib
+opencv-python
+packaging
+Pillow
+pyyaml
+pyzmq
+rarfile
+tqdm
+visualdl >= 2.0.0
 # gunicorn not support windows
 gunicorn >= 19.10.0; sys_platform != "win32"

setup.py

@@ -33,7 +33,7 @@ setup(
     long_description='',
     url='https://github.com/PaddlePaddle/PaddleHub',
     author='PaddlePaddle Author',
-    author_email='paddle-dev@baidu.com',
+    author_email='',
     install_requires=REQUIRED_PACKAGES,
     packages=find_packages(),
     package_data={
@@ -55,10 +55,6 @@ setup(
         'Intended Audience :: Education',
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Topic :: Scientific/Engineering',