Require pikepdf 0.9.1

requirements/main.txt

@@ -5,7 +5,7 @@ chardet == 3.0.4
 cffi == 1.11.5
 img2pdf == 0.3.1
 pdfminer.six == 20181108
-pikepdf == 0.9.0
+pikepdf == 0.9.1
 Pillow >= 5.0.0, != 5.1.0 ; sys_platform == "darwin"
 pycparser == 2.19
 python-xmp-toolkit == 2.0.1

setup.py

@@ -251,7 +251,7 @@ setup(
         'cffi >= 1.9.1',          # must be a setup and install requirement
         'img2pdf >= 0.3.0, < 0.4',       # pure Python, so track HEAD closely
         'pdfminer.six == 20181108',
-        'pikepdf >= 0.9.0',
+        'pikepdf >= 0.9.1',
         'Pillow >= 4.0.0, != 5.1.0 ; sys_platform == "darwin"',
                                   # Pillow < 4 has BytesIO/TIFF bug w/img2pdf 0.2.3
                                   # block 5.1.0, broken wheels