Merge pull request #50 from OldSneerJaw/48-prep-release-1.2.1

Issue 48: Prepare release of v1.2.1

Issue #48: Upgrade joi dependency to 15.0.3 for release of 1.2.1

Merge pull request #41 from OldSneerJaw/issue-40-release-1.2.0

Issue 40: Prepare release of 1.2.0

Merge pull request #39 from OldSneerJaw/38-conditional-type

Issue #38: Implementation of conditional validation type

Merge pull request #31 from OldSneerJaw/issue-30-release-1.1.0

Issue 30: Preparation for release of 1.1.0

Merge pull request #29 from OldSneerJaw/greenkeeper/nyc-12.0.1

Update nyc to the latest version 🚀

Merge pull request #21 from OldSneerJaw/issue-19-release-1.0.0

Issue 19: Preparation for release of 1.0.0

Merge branch 'issue-20-upgrade-dependencies' into master

Update package version to 0.2.0

Update changelog for release of v0.1.0