Fix ThemeManager.setItem typings

Author: ethanshar

generatedTypes/style/themeManager.d.ts

@@ -27,7 +27,7 @@ export declare class ThemeManager {
         dividerColor: string;
         components: Extendable;
     };
-    setItem(key: string, value: string): void;
+    setItem(key: string, value: any): void;
     getItem(key: string): any;
     setComponentTheme(componentName: string, overrides: Dictionary<any> | Function): void;
     setComponentForcedTheme(componentName: string, overrides: Dictionary<any> | Function): void;

src/style/themeManager.ts

@@ -32,7 +32,7 @@ export class ThemeManager {
     return this.theme;
   }
 
-  setItem(key: string, value: string) {
+  setItem(key: string, value: any) {
     if (key === 'components') {
       throw new Error('Overriding the "components" key is not possible.');
     }