Merge pull request #446 from dbt-labs/fix/435-remove-protobuf-pinning

Remove pinning as it was fixed in dbt-core

Author: dave-connors-3

run_test.sh

@@ -12,7 +12,7 @@ then
     then
         pip install "dbt-$1==1.7.1"
     else
-        pip install --pre "dbt-$1" dbt-core protobuf==4.25
+        pip install --pre "dbt-$1" dbt-core
     fi
 fi