Use pytest-html==1.20.0 (later versions have errors)

Author: mdmintz

requirements.txt

@@ -15,7 +15,7 @@ pytest>=4.6.4;python_version<"3"
 pytest>=5.0.1;python_version>="3"
 pytest-cov>=2.7.1
 pytest-forked>=1.0.2
-pytest-html>=1.21.1
+pytest-html==1.20.0
 pytest-metadata>=1.8.0
 pytest-ordering>=0.6
 pytest-rerunfailures>=7.0

setup.py

@@ -68,7 +68,7 @@
         'pytest>=4.6.4',  # Keep at >=4.6.4 for Python 2 compatibility
         'pytest-cov>=2.7.1',
         'pytest-forked>=1.0.2',
-        'pytest-html>=1.21.1',
+        'pytest-html==1.20.0',  # Keep at 1.20.0 (later versions have errors)
         'pytest-metadata>=1.8.0',
         'pytest-ordering>=0.6',
         'pytest-rerunfailures>=7.0',