[plotterparameters] Add diff support

beat/cmdline/plotterparameters.py

@@ -99,6 +99,7 @@ def plotterparameters(ctx):
     """Plotterparameters commands"""
 
     ctx.meta["asset_type"] = "plotterparameter"
+    ctx.meta["diff_fields"] = ["data"]
 
 
 CMD_LIST = [
@@ -110,6 +111,7 @@ CMD_LIST = [
     "create",
     "version",
     "fork",
+    "diff",
     ("rm", "rm_local"),
 ]