Update Version.php

Merge pull request #7956 from bartjuh4/multiple-select-fix

Export multi select values correctly

Update changelog.md

Merge pull request #7914 from bolt/release/3.7.3

Prepare release 3.7.3

Merge pull request #7884 from bolt/release/3.7.2

Prepare release 3.7.2

Merge pull request #7857 from bolt/release/3.7.1

Prepare release 3.7.1

Merge pull request #7826 from bolt/version-bump-to-php-71

Version bump to PHP 7.1

Merge pull request #7825 from bolt/release/3.6.11

Prepare release 3.6.11

Merge pull request #7803 from bolt/release/3.6.10

Preparing release 3.6.10

Merge pull request #7785 from bolt/release/3.6.9

Release/3.6.9