Enable strict mode

tsconfig.json

@@ -15,6 +15,7 @@
     "noUnusedLocals": true,
     "allowUnreachableCode": false,
     "strictNullChecks": true,
+    "strict": true,
     "sourceMap": true,
     "allowJs": true,
     "pretty": true,

webpack/sequences/step_tiles/tile_move_absolute.tsx

@@ -130,7 +130,8 @@ export class TileMoveAbsolute extends Component<StepParams, MoveAbsState> {
       const {
         stopAtHome, stopAtMax, negativeOnly, axisLength
       } = this.props.hardwareFlags;
-      ["x", "y", "z"].map((axis: Xyz) => {
+      const axes: Xyz[] = ["x", "y", "z"];
+      axes.map((axis: Xyz) => {
         const coord = parseFloat(this.getAxisValue(axis));
         const offset = parseFloat(this.getOffsetValue(axis));
         const sum = coord + offset;