fix(types): update type export to allow importing DateUtils methods

[Nibblesh]

👋🏽 Thanks for opening a pull request!

Issues: #865, #887, #896

Explicitly list module declaration for exported util functions

• Please explain clearly your changes. If they involve a lot of code, let discuss them first in on our gitter room:
  https://gitter.im/gpbl/react-day-picker
• 🙏🏽 Please DO NOT build files or update the docs in your pull request – as this may cause git conflicts. Thanks!

[codecov-io]

Codecov Report

Merging #904 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #904   +/-   ##
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  Coverage     100%   100%           
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  Files          15     15           
  Lines         659    659           
  Branches      146    146           
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  Hits          659    659

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[veddermatic]

Any ideas when this will get merged / published?

[gpbl]

Here we go, sorry – i've been too busy lately.

[milesj]

@Nibblesh @gpbl This doesn't seem to work on TS v3.5.

node_modules/react-day-picker/types/index.d.ts:10:35 - error TS2694: Namespace '"node_modules/react-day-picker/types/utils"' has no exported member 'DateUtils'.

10 export const DateUtils: UtilTypes.DateUtils;
                                     ~~~~~~~~~

node_modules/react-day-picker/types/index.d.ts:11:37 - error TS2694: Namespace '"node_modules/react-day-picker/types/utils"' has no exported member 'LocaleUtils'.

11 export const LocaleUtils: UtilTypes.LocaleUtils;
                                       ~~~~~~~~~~~

node_modules/react-day-picker/types/index.d.ts:12:40 - error TS2694: Namespace '"node_modules/react-day-picker/types/utils"' has no exported member 'ModifiersUtils'.

12 export const ModifiersUtils: UtilTypes.ModifiersUtils;
                                          ~~~~~~~~~~~~~~

[rhfung]

Same here, doesn't seem to work on TS v3.5

[Nibblesh]

Was going to give this a try today but it seems to have been fixed:
#916