fix(deps): update minor and patch for gatsby-transformer-excel

[wardpeet]

This PR contains the following updates:

Package	Type	Update	Change
xlsx (source)	dependencies	minor	^0.15.6 -> ^0.16.7

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Release Notes

SheetJS/sheetjs

### [`v0.16.7`](https://togithub.com/SheetJS/sheetjs/compare/v0.16.6...v0.16.7) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.6...v0.16.7) ### [`v0.16.6`](https://togithub.com/SheetJS/sheetjs/compare/v0.16.5...v0.16.6) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.5...v0.16.6) ### [`v0.16.5`](https://togithub.com/SheetJS/sheetjs/compare/6b1f5a013766121af79eb718d23ca3b2413508a8...v0.16.5) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/6b1f5a013766121af79eb718d23ca3b2413508a8...v0.16.5) ### [`v0.16.4`](https://togithub.com/SheetJS/sheetjs/compare/v0.16.3...6b1f5a013766121af79eb718d23ca3b2413508a8) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.3...6b1f5a013766121af79eb718d23ca3b2413508a8) ### [`v0.16.3`](https://togithub.com/SheetJS/sheetjs/compare/v0.16.2...v0.16.3) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.2...v0.16.3) ### [`v0.16.2`](https://togithub.com/SheetJS/sheetjs/blob/master/CHANGELOG.md#v0162) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.1...v0.16.2) - Disabled `PRN` parsing by default (better support for CSV without delimeters) ### [`v0.16.1`](https://togithub.com/SheetJS/sheetjs/blob/master/CHANGELOG.md#v0161) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.16.0...v0.16.1) - skip empty custom property tags if data is absent (fixes DocSecurity issue) - HTML output add raw value, type, number format - DOM parse look for `v` / `t` / `z` attributes when determining value - double quotes in properties escaped using `_x0022_` - changed AMD structure for NetSuite and other RequireJS implementations - `encode_cell` and `decode_cell` do not rely on `encode_col` / `decode_col` ### [`v0.16.0`](https://togithub.com/SheetJS/sheetjs/blob/master/CHANGELOG.md#v0160) [Compare Source](https://togithub.com/SheetJS/sheetjs/compare/v0.15.6...v0.16.0) - Date handling changed - XLML certain tag tests are now case insensitive - Fixed potentially vulnerable regular expressions

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