  envlist =
         {py35,py36,py37}-django22,
         {py36,py37,py38}-django30,
         {py36,py37,py38,py39}-django31,
         {py36,py37,py38,py39}-djangomaster,
         base,dist,lint,docs,
  
  [travis:env]
  DJANGO =
      2.2: django22
 
</s>
       {py36,py37,py38,py39}-django32,
       {py38,py39}-djangomaster,
  envlist =
         {py35,py36,py37}-django22,
         {py36,py37,py38}-django30,
         {py36,py37,py38,py39}-django31,
       {py36,py37,py38,py39}-django32,
       {py38,py39}-djangomaster,
         base,dist,lint,docs,
  
  [travis:env]
  DJANGO =
      2.2: django22
keep keep keep keep replace keep keep keep keep keep
 Dj32 (#7713)

adds django 3.2 line to the build matrix
tox.ini