Update dependency vega to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
vega	^5.33.0 -> ^6.1.2

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Release Notes

vega/vega (vega)

v6.1.2

Compare Source

v6.1.1

Compare Source

v6.1.0

Compare Source

v6.0.0

Compare Source

changes since v5.33.0

monorepo

• Vega is now ESM only! (via #​4018) (Thanks @​domoritz!)
• (fix) Correct browser export syntax (via #​4039) (Thanks @​domoritz!)
• (fix) Fix source maps (via #​4041) (Thanks @​domoritz!)
• (fix) handle string datetime in interpreter (via #​4042) (Thanks @​domoritz!)

vega-typings

• Expose resetSVGDefIds (via #​4012) (Thanks @​domoritz!)

docs

• Update deps and datasets (via #​4036) (Thanks @​domoritz!)

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