Update CHANGELOG for v1.2.1

Update CHANGELOG for v1.2.1

Update CHANGELOG for v1.2.1

Update to v1.1.3

Only accept > 0 for width and height

Merge pull request #291 from Pattern-Projector/beta

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Merge pull request #274 from Pattern-Projector/beta

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Update CHANGELOG.md to fix typo

Merge pull request #211 from Pattern-Projector/beta

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Merge pull request #175 from Pattern-Projector/beta

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