Patch: Sheet pageMargins and printOptions

• Introduce Sheet.pageMarginsPreset
• Fix for Sheet.pageMargins
• Fix for Sheet.printOptions

Features: Sheet pageMargins and printOptions

• Sheet pageMargins support added for adjusting margins: top, bottom, left, right, header, footer.
• Sheet printOptions support added for: gridLines, gridLinesSet, headings, horizontalCentered, verticalCentered.

KNOWN BUG
New pageMargins and printOptions features do not work as expected. If you are using this version, then all page margins: left, right, top, bottom, header, and footer must be defined for each sheet. Otherwise Excel cannot parse the file. To disable printOptions, the attribute must be removed. Setting to false still enables the option.

Features: Additional hyperlink support

Hyperlinks functionality is extended to support:

• email,
• internal addresses, and
• tooltip.

Maintenance: Update buffers

Now using Buffer.from() and Buffer.alloc() inplace of new Buffer. Please see buffer constructor deprecation.