fix(exports): stabilize published types and compatibility with updated dependencies

test/fixtures/strict-consumer/index.ts

@@ -0,0 +1,7 @@
+import type { TPostingKey, TSKRType } from '@fin.cx/skr';
+
+const skrType: TSKRType = 'SKR03';
+const postingKey: TPostingKey = 40;
+
+void skrType;
+void postingKey;