Lock package versions

Author: alexforencich

tox.ini

@@ -11,13 +11,13 @@ python =
 
 [testenv]
 deps =
-    pytest
-    pytest-xdist
-    pytest-split
-    cocotb
-    cocotb-test
-    cocotbext-axi
-    jinja2
+    pytest == 6.2.5
+    pytest-xdist == 2.4.0
+    pytest-split == 0.4.0
+    cocotb == 1.6.1
+    cocotb-test == 0.2.1
+    cocotbext-axi == 0.1.16
+    jinja2 == 3.0.3
 
 commands =
     pytest -n auto {posargs}