Merge v6.2.2 (mainly to get release notes)

docs/release_notes.rst

@@ -61,6 +61,13 @@ v7.0.0
 
     +   It may be necessary to separately ``pip install pycparser`` to avoid `another Python 3.7 issue <https://github.com/eliben/pycparser/pull/135>`_.
 
+v6.2.2
+------
+
+-   Backport compatibility fixes for Python 3.7 and ruffus 2.7.0 from v7.0.0
+-   Backport fix to ignore masks when deciding what colors are on a page
+-   Backport some minor improvements from v7.0.0: better argument validation and warnings about the Tesseract 4.0.0 ``--user-words`` regression
+
 v6.2.1
 ------
 

requirements.txt

@@ -8,4 +8,4 @@ Pillow >= 5.0.0, != 5.1.0 ; sys_platform == "darwin"
 pycparser == 2.18
 python-xmp-toolkit == 2.0.1
 reportlab == 3.4.0
-ruffus == 2.7
+ruffus == 2.7.0

setup.py

@@ -255,7 +255,7 @@ setup(
                                   # block 5.1.0, broken wheels
         'python-xmp-toolkit >= 2, < 3',
         'reportlab >= 3.3.0',     # oldest released version with sane image handling
-        'ruffus >= 2.7',
+        'ruffus >= 2.7.0',
     ],
     extras_require={
         'fitz': [],  # Backward compatibility