Pin requirements versions

requirements.txt

@@ -1,14 +1,14 @@
-Click>=6.0
-click-default-group>=1.2
+Click==7.1.2
+click-default-group==1.2.2
 contextlib2==0.6.0.post1
-future>=0.16.0
-inflection>=0.3
-isodate>=0.6
-lxml>=4.1
-markdown>=2.6
-Pillow>=5.0
+future==0.18.2
+inflection==0.4.0
+isodate==0.6.0
+lxml==4.5.0
+markdown==3.1.1 # pyup: >=3.1,<3.2 # 3.2 drops Python 2.7 support
+Pillow==7.1.2
 python-redmine==2.2.1
-regex>=2018.2
-six>=1.11
-tabulate>=0.8
-textile>=3.0
+regex==2020.4.4
+six==1.14.0
+tabulate==0.8.7
+textile==3.0.4 # pyup: >=3.0,<4.0 # 4.0 drops Python 2.7 support