Revert "Update tests to use a custom timezone in the case where the local timezone happens to be UTC"

This reverts commit ef82866f90aa513b2d19f8f14a6d14427e7442ab.
Merge remote-tracking branch 'upstream/master'
Revert "Revert "Update tests to use a custom timezone in the case where the local timezone happens to be UTC""

This reverts commit 7112c0aa6bb6926b82475d16fef2282af2ab8028.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/sebastienros/jint
Allow null values for nullable types

Do a null check and allow null values for nullable types in the
DefaultTypeConverter
Merge pull request #90 from honestegg/Null-check-in-type-converter

Null check in type converter