Strictly type authMachine and bump xstate to ^4.29.0

[wlee221]

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[lgtm-com]

This pull request fixes 1 alert when merging 0b6496d into 43d8106 - view on LGTM.com

fixed alerts:

• 1 for Unused variable, import, function or class

[lgtm-com]

This pull request fixes 1 alert when merging 20bed1e into 43d8106 - view on LGTM.com

fixed alerts:

• 1 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert when merging ab548f4 into c57a023 - view on LGTM.com

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[lgtm-com]

This pull request introduces 1 alert when merging a36f69b into 040daa2 - view on LGTM.com

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[lgtm-com]

This pull request introduces 1 alert when merging 86bbbe9 into e73e027 - view on LGTM.com

new alerts:

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[lgtm-com]

This pull request introduces 3 alerts when merging 68b654e into e73e027 - view on LGTM.com

new alerts:

• 3 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 3 alerts when merging 33aa666 into af566dd - view on LGTM.com

new alerts:

• 3 for Unused variable, import, function or class

[wlee221]

Closing in favor of #1386