Merge pull request #6284 from levackt/patch-1

Update version range in introduction-to-smart-contracts.rst

docs/introduction-to-smart-contracts.rst

@@ -33,7 +33,7 @@ Storage
 
 The first line simply tells that the source code is written for
 Solidity version 0.4.0 or anything newer that does not break functionality
-(up to, but not including, version 0.6.0). This is to ensure that the
+(up to, but not including, version 0.7.0). This is to ensure that the
 contract is not compilable with a new (breaking) compiler version, where it could behave differently.
 :ref:`Pragmas<pragma>` are common instructions for compilers about how to treat the
 source code (e.g. `pragma once <https://en.wikipedia.org/wiki/Pragma_once>`_).