Add extra envs.

Author: ionelmc

tox.ini

@@ -15,7 +15,7 @@ envlist =
     check
     py{36,37,py,py3}-pytest46-xdist127-coverage{55}
     py{36,37,38,py3}-pytest{46,54}-xdist133-coverage{55}
-    py{36,37,38,39,310,py3}-pytest{62}-xdist202-coverage{55}
+    py{36,37,38,39,310,py3}-pytest{62}-xdist250-coverage{55,60,61,62,63}
     docs
 
 [testenv]
@@ -40,6 +40,7 @@ setenv =
     xdist200: _DEP_PYTESTXDIST=pytest-xdist==2.0.0
     xdist201: _DEP_PYTESTXDIST=pytest-xdist==2.1.0
     xdist202: _DEP_PYTESTXDIST=pytest-xdist==2.2.0
+    xdist250: _DEP_PYTESTXDIST=pytest-xdist==2.5.0
     xdistdev: _DEP_PYTESTXDIST=git+https://github.com/pytest-dev/pytest-xdist.git#egg=pytest-xdist
 
     coverage45: _DEP_COVERAGE=coverage==4.5.4
@@ -49,6 +50,10 @@ setenv =
     coverage53: _DEP_COVERAGE=coverage==5.3.1
     coverage54: _DEP_COVERAGE=coverage==5.4
     coverage55: _DEP_COVERAGE=coverage==5.5
+    coverage60: _DEP_COVERAGE=coverage==6.0.2
+    coverage61: _DEP_COVERAGE=coverage==6.1.2
+    coverage62: _DEP_COVERAGE=coverage==6.2
+    coverage63: _DEP_COVERAGE=coverage==6.3
     # For testing against a coverage.py working tree.
     coveragedev: _DEP_COVERAGE=-e{env:COVERAGE_HOME}
 passenv =