Bump copyright dates and remove Java 8 reference

Author: rnorth

README.md

@@ -1,6 +1,6 @@
 # Testcontainers
 
-> Testcontainers is a Java 8 library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
+> Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
 
 [![Build Status](https://travis-ci.org/testcontainers/testcontainers-java.svg?branch=master)](https://travis-ci.org/testcontainers/testcontainers-java)[ ![Download](https://api.bintray.com/packages/testcontainers/releases/testcontainers/images/download.svg) ](https://bintray.com/testcontainers/releases/testcontainers/_latestVersion)
 
@@ -14,10 +14,10 @@ See [LICENSE](LICENSE).
 
 ## Copyright
 
-Copyright (c) 2015 - 2020 Richard North and other authors.
+Copyright (c) 2015 - 2021 Richard North and other authors.
 
-MS SQL Server module is (c) 2017 - 2020 G DATA Software AG and other authors.
+MS SQL Server module is (c) 2017 - 2021 G DATA Software AG and other authors.
 
-Hashicorp Vault module is (c) 2017 - 2020 Capital One Services, LLC and other authors.
+Hashicorp Vault module is (c) 2017 - 2021 Capital One Services, LLC and other authors.
 
 See [contributors](https://github.com/testcontainers/testcontainers-java/graphs/contributors) for all contributors.