Fix constructor return type inference for published npm.

Author: kburov-sc

src/Container.ts

@@ -417,19 +417,36 @@ export class Container<Services = {}> {
    *            specifying these dependencies.
    * @returns A new Container instance containing the newly created service, allowing for method chaining.
    */
-  providesClass = <
+  providesClass<
     Token extends TokenType,
     Tokens extends readonly ValidTokens<Services>[],
     Class extends {
       readonly dependencies: Tokens;
-      new (...args: Params): InstanceType<Class>;
+      new (...args: Params): any;
     },
     Params extends MapTokensToTypes<Services, Class["dependencies"]>,
   >(
     token: Token,
     cls: Class
-  ): Container<AddService<Services, Token, InstanceType<Class>>> =>
-    this.providesService(Injectable(token, cls.dependencies, (...args: Params) => new cls(...args)));
+  ): Class extends {
+    readonly dependencies: Tokens;
+    new (...args: Params): infer Service;
+  }
+    ? Container<AddService<Services, Token, Service>>
+    : never;
+
+  providesClass<
+    Service,
+    Token extends TokenType,
+    Tokens extends readonly ValidTokens<Services>[],
+    Class extends {
+      readonly dependencies: Tokens;
+      new (...args: Params): Service;
+    },
+    Params extends MapTokensToTypes<Services, Class["dependencies"]>,
+  >(token: Token, cls: Class): Container<AddService<Services, Token, Service>> {
+    return this.providesService(Injectable(token, cls.dependencies, (...args: Params) => new cls(...args)));
+  }
 
   /**
    * Registers a static value as a service in the container. This method is ideal for services that do not

src/__tests__/Container.spec.ts

@@ -152,6 +152,7 @@ describe("Container", () => {
       }
       const containerWithService = container.providesClass("service", Item);
       expect(containerWithService.get("service")).toEqual(new Item(1));
+      expect(containerWithService.factories.service().value).toBe(1);
     });
 
     test("error if class constructor arity doesn't match dependencies", () => {