Fix linting errors

Author: philipstanislaus

src/arrayToTree.spec.ts

@@ -8,12 +8,12 @@ describe('arrayToTree', () => {
       { id: '31', parentId: '4', custom: '12' },
       { id: '1941', parentId: '418', custom: 'de' },
       { id: '1', parentId: '418', custom: 'ZZZz' },
-      { id: '418', parentId: null, custom: 'ü'},
+      { id: '418', parentId: null, custom: 'ü' },
     ])).to.deep.equal([
       { data: { id: '4', parentId: null, custom: 'abc' }, children: [
         { data: { id: '31', parentId: '4', custom: '12' }, children: [] },
       ] },
-      { data: { id: '418', parentId: null, custom: 'ü'}, children: [
+      { data: { id: '418', parentId: null, custom: 'ü' }, children: [
         { data: { id: '1941', parentId: '418', custom: 'de' }, children: [] },
         { data: { id: '1', parentId: '418', custom: 'ZZZz' }, children: [] },
       ] },
@@ -27,14 +27,14 @@ describe('arrayToTree', () => {
         { num: '31', ref: '4', custom: '12' },
         { num: '1941', ref: '418', custom: 'de' },
         { num: '1', ref: '418', custom: 'ZZZz' },
-        { num: '418', ref: null, custom: 'ü'},
+        { num: '418', ref: null, custom: 'ü' },
       ] as any),
       { id: 'num', parentId: 'ref' },
     )).to.deep.equal([
       { data: { num: '4', ref: null, custom: 'abc' }, children: [
         { data: { num: '31', ref: '4', custom: '12' }, children: [] },
       ] },
-      { data: { num: '418', ref: null, custom: 'ü'}, children: [
+      { data: { num: '418', ref: null, custom: 'ü' }, children: [
         { data: { num: '1941', ref: '418', custom: 'de' }, children: [] },
         { data: { num: '1', ref: '418', custom: 'ZZZz' }, children: [] },
       ] },

src/arrayToTree.ts

@@ -1,11 +1,11 @@
 export interface Item {
   id: string
-  parentId: string|null,
+  parentId: string | null,
   [key: string]: any,
 }
 
 export interface TreeItem {
-  data: Item|null
+  data: Item | null
   children: TreeItem[]
 }