message: Fix a tiny bug which causes terminal border widgets to not register.
diff: @@ -172,7 +172,7 @@ class PackageParser {
  syntaxThemes: parseObjectListJson(contributes, "syntaxThemes", node => this.parseSyntaxThemeContributionsJson(node)),
  syntaxThemeProviders: parseObjectListJson(contributes, "syntaxThemeProviders", node => this.parseSyntaxThemeProviderContributionsJson(node)),
  tabTitleWidgets: parseObjectListJson(contributes, "tabTitleWidgets", node => this.parseTabTitleItemContributionsJson(node)),
  - terminalBorderWidgets: parseObjectListJson(contributes, "terminalBorderWidget", node => this.parseTerminalBorderWidgetContributionsJson(node)),
  + terminalBorderWidgets: parseObjectListJson(contributes, "terminalBorderWidgets", node => this.parseTerminalBorderWidgetContributionsJson(node)),
  terminalThemes: parseObjectListJson(contributes, "terminalThemes", node => this.parseTerminalThemeContributionsJson(node)),
  terminalThemeProviders: parseObjectListJson(contributes, "terminalThemeProviders", node => this.parseTerminalThemeProviderContributionsJson(node)),
  viewers: parseObjectListJson(contributes, "viewers", node => this.parseViewerConstributionJson(node)),
  