refactor: add explicit return types to config exports

Author: mitchelvanbever

src/configs/backend.ts

@@ -44,4 +44,4 @@ export function createBackendConfig(): FlatConfigArray {
 	] as FlatConfigArray;
 }
 
-export const backend = createBackendConfig();
+export const backend: FlatConfigArray = createBackendConfig();

src/configs/base.ts

@@ -105,4 +105,4 @@ export function createBaseConfig(options: InstantConfig = {}): FlatConfigArray {
 	) as FlatConfigArray;
 }
 
-export const base = createBaseConfig();
+export const base: FlatConfigArray = createBaseConfig();

src/configs/react.ts

@@ -123,4 +123,4 @@ export function createReactConfig(options: InstantConfig = {}): FlatConfigArray
 	return configs;
 }
 
-export const reactConfig = createReactConfig();
+export const reactConfig: FlatConfigArray = createReactConfig();