Bug: Fixes non-strict Typeahead behaviour related to onValue and validation

[agubler]

Type: bug

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code matches the style guide
• [x] Unit tests are included in the PR
• [ ] For new widgets, an entry has been added to the .dojorc
• [ ] For new widgets, theme.variant() is added to the root domnode
• [ ] Any widget variant uses theme.compose like this
• [ ] WidgetProperties are exported

Description:

Fixes issues relating to the Typeahead non-strict behaviour

Resolves #1620 Resolves #1621

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dojo.widgets – ./

🔍 Inspect: https://vercel.com/dojo/dojowidgets/cy1awyfti
✅ Preview: https://dojowidgets-git-fork-agubler-typeahead-validation-non-strict.dojo1.vercel.app

widget-test-docs – ./

🔍 Inspect: https://vercel.com/dojo/widget-test-docs/kev3at0hg
✅ Preview: https://widget-test-do-git-fork-agubler-typeahead-validation-non-7b01ec.dojo1.vercel.app

[codecov[bot]]

Codecov Report

Merging #1622 (73b4406) into master (a754558) will increase coverage by 0.09%. The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master    #1622      +/-   ##
==========================================
+ Coverage   89.97%   90.07%   +0.09%     
==========================================
  Files          94       94              
  Lines        4897     4906       +9     
  Branches     1316     1323       +7     
==========================================
+ Hits         4406     4419      +13     
  Misses        244      244              
+ Partials      247      243       -4     

Impacted Files	Coverage Δ
src/typeahead/index.tsx	85.71% <93.33%> (+2.60%)	:arrow_up:
src/date-input/index.tsx	94.28% <0.00%> (-0.82%)	:arrow_down:

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