add a couple of MySQL specific mods to our migrations where we need to use the...

add a couple of MySQL specific mods to our migrations where we need to use the `TEXT` type instead of `VARCHAR` on mysql.

resources/migrations/010_add_revision_table.yaml

@@ -61,3 +61,8 @@ databaseChangeLog:
             replace:
               replace: WITHOUT
               with: WITH
+        - modifySql:
+            dbms: mysql
+            replace:
+              replace: object VARCHAR
+              with: object TEXT

resources/migrations/013_add_activity_table.yaml

@@ -85,3 +85,8 @@ databaseChangeLog:
             replace:
               replace: WITHOUT
               with: WITH
+        - modifySql:
+            dbms: mysql
+            replace:
+              replace: details VARCHAR
+              with: details TEXT