Add CI checks for 1.6

tox.ini

@@ -151,10 +151,18 @@ commands =
     dbt deps
     dbt build --target snowflake
 
+[testenv:integration_snowflake_1_6_0]
+changedir = integration_test_project
+deps = dbt-snowflake~=1.6.0
+commands =
+    dbt clean
+    dbt deps
+    dbt build --target snowflake
+
 # Databricks integration tests
 [testenv:integration_databricks]
 changedir = integration_test_project
-deps = dbt-databricks~=1.4.0
+deps = dbt-databricks~=1.6.0
 commands =
     dbt clean
     dbt deps
@@ -184,10 +192,18 @@ commands =
     dbt deps
     dbt build --target databricks
 
+[testenv:integration_databricks_1_6_0]
+changedir = integration_test_project
+deps = dbt-databricks~=1.6.0
+commands =
+    dbt clean
+    dbt deps
+    dbt build --target databricks
+
 # Bigquery integration tests
 [testenv:integration_bigquery]
 changedir = integration_test_project
-deps = dbt-bigquery~=1.4.0
+deps = dbt-bigquery~=1.6.0
 commands =
     dbt clean
     dbt deps
@@ -217,6 +233,14 @@ commands =
     dbt deps
     dbt build --target bigquery --vars '"my_var": "my value"'
 
+[testenv:integration_bigquery_1_6_0]
+changedir = integration_test_project
+deps = dbt-bigquery~=1.6.0
+commands =
+    dbt clean
+    dbt deps
+    dbt build --target bigquery --vars '"my_var": "my value"'
+
 # Spark integration test (disabled)
 [testenv:integration_spark]
 changedir = integration_test_project