message: Fix eslint no-invalid-this
diff: @@ -9,7 +9,7 @@ import * as utils from '../utils'
  export class SectionNodeProvider implements vscode.TreeDataProvider<Section> {
  private _onDidChangeTreeData: vscode.EventEmitter<Section | undefined> = new vscode.EventEmitter<Section | undefined>()
  - readonly onDidChangeTreeData: vscode.Event<Section | undefined> = this._onDidChangeTreeData.event
  + readonly onDidChangeTreeData: vscode.Event<Section | undefined>
  private hierarchy: string[]
  private sectionDepths: { string?: number } = {}
  public root: string = ''
  @@ -18,6 +18,7 @@ export class SectionNodeProvider implements vscode.TreeDataProvider<Section> {
  public ds: Section[] = []
  constructor(private extension: Extension) {
  + this.onDidChangeTreeData = this._onDidChangeTreeData.event
  const configuration = vscode.workspace.getConfiguration('latex-workshop')
  this.hierarchy = configuration.get('view.outline.sections') as string[]
  this.hierarchy.forEach((section, index) => {
  