Update @dojo/core to alpha.26

[mwistrand]

Type: feature

The following has been addressed in the PR:

• [ ] There is a related issue
• [ ] All code matches the style guide
• [ ] Unit or Functional tests are included in the PR

Description:

Blocked by #67. Updates the @dojo/core peer dependency to alpha.26.

[codecov[bot]]

Codecov Report

Merging #68 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #68   +/-   ##
=======================================
  Coverage   98.91%   98.91%           
=======================================
  Files          11       11           
  Lines         367      367           
  Branches       48       48           
=======================================
  Hits          363      363           
  Partials        4        4

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