Implemented strict linting standards and prettier formatting config. (#248)

* Implemented strict linting standards and prettier formatting config.

* More linter fixes and type updates.

* More linter updates and type fixes

* Remove noisy comments

* Linter and type updates

* Linter, formatting and type updates.

* Linter updates

* Type updates

* Type updates

* fixed all linter errors

* Fixed all linting, formatting and type issues.

* Resolve merge conflicts.

lib/types/dropdownmenu.d.ts

@@ -1,10 +1,11 @@
-import { WindowProps } from "types/widgets/window";
+import { WindowProps } from 'types/widgets/window';
+import { GtkWidget, Transition } from './widget';
 
 export type DropdownMenuProps = {
     name: string;
-    child: any;
+    child: GtkWidget;
     layout?: string;
-    transition?: any;
+    transition?: Transition;
     exclusivity?: Exclusivity;
     fixed?: boolean;
 } & WindowProps;