M requirements.txt → requirements.txt

@@ -1,18 +1,18 @@
 appdirs==1.4.4
-attrs==20.3.0
-booleanOperations==0.9.0
+attrs>=19
+booleanOperations>=0.9.0
 cffsubr==0.2.7
-compreffor==0.5.0
-cu2qu==1.6.7
+compreffor>=0.4.6
+cu2qu>=1.6.7
 fontmake==2.2.1
-fontMath==0.6.0
-fonttools==4.17.1
+fontMath>=0.6.0
+fonttools>=3.32.0
 fs==2.4.11
-glyphsLib==5.2.0
+glyphsLib>=5.2.0
 lxml==4.6.1
 pyclipper==1.2.0
 pytz==2020.4
 six==1.15.0
-ufo2ft==2.16.0
-ufoLib2==0.8.0
+ufo2ft>=2.16.0
+ufoLib2>=0.8.0
 unicodedata2==13.0.0.post2