Tweaked gitignore

gitignore removed all composer and npm files, so automated builds would fail

conf/site/node_modules/react-bootstrap/SplitButton.d.ts

@@ -0,0 +1,31 @@
+import * as React from 'react';
+
+import DropdownToggle from './DropdownToggle';
+import Dropdown from './Dropdown';
+
+import { ReplaceProps } from './helpers';
+
+type PropsFromToggle = Partial<
+  Pick<
+    React.ComponentPropsWithRef<typeof DropdownToggle>,
+    'size' | 'variant' | 'disabled'
+  >
+>;
+
+export interface SplitButtonProps extends PropsFromToggle {
+  id: string | number;
+  toggleLabel?: string;
+  href?: string;
+  target?: string;
+  onClick?: React.MouseEventHandler<this>;
+  title: React.ReactNode;
+  menuRole?: string;
+  rootCloseEvent?: 'click' | 'mousedown';
+  bsPrefix?: string;
+}
+
+declare class SplitButton extends React.Component<
+  ReplaceProps<typeof Dropdown, SplitButtonProps>
+> {}
+
+export default SplitButton;