update root folder links (#345)

README.md

@@ -15,13 +15,13 @@
 [![static analysis](https://github.com/yiisoft/di/workflows/static%20analysis/badge.svg)](https://github.com/yiisoft/di/actions?query=workflow%3A%22static+analysis%22)
 [![type-coverage](https://shepherd.dev/github/yiisoft/di/coverage.svg)](https://shepherd.dev/github/yiisoft/di)
 
-[PSR-11](http://www.php-fig.org/psr/psr-11/) compatible
-[dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container that's able to instantiate
+[PSR-11](https://www.php-fig.org/psr/psr-11/) compatible
+[dependency injection](https://en.wikipedia.org/wiki/Dependency_injection) container that's able to instantiate
 and configure classes resolving dependencies.
 
 ## Features
 
-- [PSR-11](http://www.php-fig.org/psr/psr-11/) compatible.
+- [PSR-11](https://www.php-fig.org/psr/psr-11/) compatible.
 - Supports property injection, constructor injection and method injection.
 - Detects circular references.
 - Accepts array definitions. You can use it with mergeable configs.
@@ -497,7 +497,7 @@ $container = new Container($config);
 
 ## Further reading
 
-- [Martin Fowler's article](http://martinfowler.com/articles/injection.html).
+- [Martin Fowler's article](https://martinfowler.com/articles/injection.html).
 
 
 # Benchmarks