xlsx-spec-models 0.6.0

Added

• Prototype OpenXml interface generator which reads from the Microsoft Docs documentation.
  • Next step: integrate generator with XSD files definitions from ECMA-376 spec to generate spec correct/compliant interfaces

Changes

• TypeScript - enable strict compiler checking
  • Fix compiler errors related to strict
  • Change some OpenXml properties to be optional/nullable to align with the spec
• Update dependency dom-builder@0.9.0
• Update links to Microsoft OpenXml documentation