fixup tests due to the new params

Author: atticus-sullivan

plotly/src/traces/heat_map.rs

@@ -262,9 +262,11 @@ mod tests {
             "x": [0.0, 1.0],
             "xcalendar": "hebrew",
             "xaxis": "x",
+            "xgap": 1.0,
             "y": [2.0, 3.0],
             "yaxis": "y",
             "ycalendar": "islamic",
+            "ygap": "10",
             "z": [[4.0, 5.0], [6.0, 7.0]],
             "zauto": true,
             "zhoverformat": "fmt",