feat(editor-base): autoRefresh addon

[tpluscode]

Highly anticipating v6 of CodeMirror, for now we're all but left with copying addons and converting from AMD to ES module

This adds a copy of autoRefres, complete with

[changeset-bot]

🦋 Changeset detected

Latest commit: 4cb6d2b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@rdfjs-elements/editor-base	Minor
@rdfjs-elements/rdf-editor	Patch
@rdfjs-elements/sparql-editor	Patch

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[codecov-commenter]

Codecov Report

Merging #72 (4731ba9) into master (ae30a0d) will decrease coverage by 0.93%.
The diff coverage is 72.91%.

❗ Current head 4731ba9 differs from pull request most recent head 29e5dfd. Consider uploading reports for the commit 29e5dfd to get more accurate results

@@            Coverage Diff             @@
##           master      #72      +/-   ##
==========================================
- Coverage   93.67%   92.74%   -0.94%     
==========================================
  Files          15       16       +1     
  Lines        1233     1281      +48     
==========================================
+ Hits         1155     1188      +33     
- Misses         78       93      +15     

Impacted Files	Coverage Δ
packages/editor-base/lib/autorefresh.js	66.66% <66.66%> (ø)
packages/editor-base/index.js	97.04% <100.00%> (+0.08%)	⬆️
packages/sparql-editor/src/SparqlEditor.js	96.26% <0.00%> (-1.87%)	⬇️

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