Update JSXGraph to the latest version.

The console logging issue has been fixed, and the intermediate grid bug
(that was in the versions between where PG-2.19 now is and this) has
also been fixed.

Author: drgrice1

htdocs/js/GraphTool/graphtool.js

@@ -112,7 +112,7 @@ window.graphTool = (containerId, options) => {
 			straightLast: false,
 			fixed: true
 		},
-		grid: { gridX: gt.snapSizeX, gridY: gt.snapSizeY },
+		grid: { majorStep: [gt.snapSizeX, gt.snapSizeY] },
 		keyboard: {
 			enabled: true,
 			dx: gt.snapSizeX,

htdocs/package-lock.json

@@ -13,7 +13,7 @@
         "prettier-check": "prettier --ignore-path=../.gitignore --check \"**/*.{js,css,scss,html}\" \"../**/*.dist.yml\""
     },
     "dependencies": {
-        "jsxgraph": "^1.7.0",
+        "jsxgraph": "^1.9.2",
         "jszip": "^3.10.1",
         "jszip-utils": "^0.1.0",
         "mathquill": "github:openwebwork/mathquill#WeBWorK-2.19",

htdocs/package.json

@@ -1105,7 +1105,7 @@ sub constructJSXGraphOptions {
 				x => { ticks => { ticksDistance => $self->{ticksDistanceX}, minorTicks => $self->{minorTicksX} } },
 				y => { ticks => { ticksDistance => $self->{ticksDistanceY}, minorTicks => $self->{minorTicksY} } }
 			},
-			grid => { gridX => $self->{gridX}, gridY => $self->{gridY} }
+			grid => { majorStep => [ $self->{gridX}, $self->{gridY} ] }
 		)
 	});