feat: support top level JSX with blank lines

[JounQin]

No description provided.

[codecov]

Codecov Report

Merging #37 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #37   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          16     16           
  Lines         310    314    +4     
  Branches       58     58           
=====================================
+ Hits          310    314    +4

Impacted Files	Coverage Δ
packages/eslint-mdx/src/traverse.ts	100% <100%> (ø)	⬆️
packages/eslint-mdx/src/parser.ts	100% <100%> (ø)	⬆️
...ackages/eslint-plugin-mdx/src/configs/overrides.ts	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 21934ce...2ee1b37. Read the comment docs.