update scipy version and scikit-learn version.

requirements.txt

@@ -1,8 +1,8 @@
 numpy >= 1.17.0
-scipy >= 1.3.3
+scipy >= 1.5.3
 matplotlib >= 3.2.1
 Pillow >= 2.0.0
 pytest >= 4.3.1
 wheel >= 0.32.0
 setuptools >= 40.8.0
-scikit-learn >= 0.21.2
+scikit-learn >= 0.23.1

setup.py

@@ -101,11 +101,11 @@ setup(
         'bdist_wheel': bdist_wheel
     },
     install_requires=[
-        'scipy >= 1.3.3',
+        'scipy >= 1.5.3',
         'numpy >= 1.17.0',
         'matplotlib >= 3.2.1',
         'Pillow >= 2.0.0',
-        'scikit-learn >= 0.21.2'
+        'scikit-learn >= 0.23.1'
     ],
     classifiers=[
         'License :: OSI Approved :: Apache Software License'