Handle stylelint validation errors gracefully

[Gelio]

If the promise returned from the stylelint's validate function rejects, the error is now handled by logging it to stderr.

This means the rejection is no longer unhandled.

validate fails for me in projects where I did not have stylelint set up:

[ ERROR ] 2021-04-29T09:12:24+0200 ] ...nt_nvimCuKCET/usr/share/nvim/runtime/lua/vim/lsp/rpc.lua:457 ] "rpc" "stylelint-lsp" "stderr" "Error when trying to validate file:///home/grzegorz/projects/cloudify/cloudify-stage/test/cypress/integration/widgets/deployments_view_spec.ts Error: No configuration provided for /home/grzegorz/projects/cloudify/cloudify-stage/test/cypress/integration/widgets/deployments_view_spec.ts\n at module.exports (/home/grzegorz/projects/open-source/stylelint-lsp/node_modules/stylelint/lib/utils/configurationError.js:10:14)\n at /home/grzegorz/projects/open-source/stylelint-lsp/node_modules/stylelint/lib/getConfigForFile.js:56:11\n at async validate (/home/grzegorz/projects/open-source/stylelint-lsp/dist/validate.js:37:36)\n at async /home/grzegorz/projects/open-source/stylelint-lsp/dist/validate.js:118:17 {\n code: 78\n}\n"

[codecov[bot]]

Codecov Report

Merging #18 (bd989a5) into master (25891c7) will decrease coverage by 0.36%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #18      +/-   ##
==========================================
- Coverage   64.85%   64.48%   -0.37%     
==========================================
  Files           6        6              
  Lines         350      352       +2     
  Branches       57       57              
==========================================
  Hits          227      227              
- Misses        104      106       +2     
  Partials       19       19              

Impacted Files	Coverage Δ
src/validate.ts	38.46% <0.00%> (-0.76%)	:arrow_down:

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[bmatcuk]

I released v1.2.2 with this fix =)

[Gelio]

Great, I'm glad I could help 😄