Added test requirements

InvalidPointer · InvalidPointer · commit 5160671ea725 · 2019-10-02T17:28:54.000+03:00
diff --git a/tox.ini b/tox.ini
@@ -54,6 +54,9 @@ deps =
     tests: pandas
     tests: swat
     tests: kerberos ; platform_system != "Windows"
+    tests: xgboost
+    tests: lightgbm
+    tests: lxml
     codecov: codecov >= 1.4.0
     doc: sphinx == 1.8
 
