ci: upgrade node

Author: sgratzl

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: 14
       - run: npm i -g yarn
       - run: yarn set version 2
       - run: cat .yarnrc_patch.yml >> .yarnrc.yml

src/elements/base.ts

@@ -251,7 +251,7 @@ export class StatsBase<T extends IStatsBaseProps, O extends IStatsBaseOptions> e
       radius: options.itemRadius,
       borderWidth: options.itemBorderWidth,
     };
-    const outliers = new Set(props.outliers ?? []);
+    const outliers = new Set(props.outliers || []);
 
     if (vert) {
       props.items.forEach((v) => {