Update dependency @ianwalter/bff to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@ianwalter/bff	devDependencies	major	^5.2.1 -> ^6.0.1

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Release Notes

ianwalter/bff

v6.0.1

Compare Source

• Removing webpack dep 6afd0b4
• Update README.md d009bbe

v6.0.0

Compare Source

• Merge pull request #​73 from ianwalter/v6-dev e810f80
• Fixing typo 6921361
• Adding comments de8524c
• Improving registration logic 7cc15a3
• Adding generateTestMap and processFiles methods to registration logic 9a9fb49
• Updating comments 1924118
• Removing puppeteer code c24d001
• Create FUNDING.yml 1d85f3b
• Adding #​70: Allow empty test functions 09d7111
• Adding #​74: Add sleep method to context 188c4da
• Merge branch 'master' of github.com:ianwalter/bff into v6-dev 1c40051
• Using template literal instead 23c9168
• Merge pull request #​72 from ianwalter/renovate/webpack-4.x f781115
• Adding #​71: Save .js exension in snapshot filename 8960dec
• Update dependency webpack to ^4.34.0 f27abb4
• Update dependency np to ^5.0.3 87186ba
• Fixing tags test 8865363

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