update min layer time to respect min output speed

src/kiri/core/conf.js

@@ -294,7 +294,7 @@ export const conf = {
                 outputLayerRetract: false,
                 outputLoops: 0,
                 outputMinLayerTime: 10,
-                outputMinSpeed: 10.0,
+                outputMinSpeed: 5.0,
                 outputPurgeTower: 0,
                 outputRaft: false,
                 outputRaftSpacing: 0.2,

src/kiri/core/print.js

@@ -129,6 +129,7 @@ class Print {
             close = !options.open,
             scarf = !poly.open ? (options.scarf ?? 0) : false,
             tool = options.tool,
+            zmax = options.zmax,
             last = startPoint,
             first = true;