Update dependency postcss-calc to v8.2.4

This MR contains the following updates:

Package	Type	Update	Change
postcss-calc	devDependencies	minor	^8.0.0 -> 8.2.4

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Release Notes

postcss/postcss-calc

v8.2.4

Patch Changes

• convert source to CommonJS and publish untranspiled code (b55adcb)

v8.2.3

Compare Source

Bug Fixes

• improve types (f2cce1b)

8.2.2 (2022-01-12)

Bug Fixes

• respect CSS var when reducing (99d9fa5)

v8.2.2

Compare Source

v8.2.1

Compare Source

Bug Fixes

• preserve brackets around functions (0b70a1d), closes #​113 #​115

v8.2.0

Compare Source

Features

• add types (#​155) (4c96c79)

v8.1.0

Compare Source

Features

• avoid fatal error (#​137) (125be6a)

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