chore(deps): update all non-major dependencies (patch)

This MR contains the following updates:

Package	Type	Update	Change
karma (source)	devDependencies	patch	6.3.6 -> 6.3.7
karma-firefox-launcher	devDependencies	patch	2.1.1 -> 2.1.2

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Release Notes

karma-runner/karma

v6.3.7

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Bug Fixes

• middleware: replace %X_UA_COMPATIBLE% marker anywhere in the file (f1aeaec), closes #​3711

karma-runner/karma-firefox-launcher

v2.1.2

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Bug Fixes

• launcher does not kill firefox.exe on WSL (3954ad4), closes /github.com/karma-runner/karma-firefox-launcher/issues/101#issuecomment-891850143

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