fix parsing field names which start with a number

[svirschevskiy]

It fixes parsing field names which start with numbers

const fields =  [{
    name: "1a",
    value: " "
  },  {
    name: "2a",
    value: " "
  },  {
    name: "3a",
    value: " "
 }]

Actual result

form.values() // [" ", " ", " "]

Expected result

form.values() // {"1s": " ", "2s": " ", "3s": " "}

[codecov-io]

Codecov Report

Merging #425 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #425   +/-   ##
=======================================
  Coverage   95.88%   95.88%           
=======================================
  Files         112      112           
  Lines        2213     2213           
=======================================
  Hits         2122     2122           
  Misses         91       91

Impacted Files	Coverage Δ
src/parser.js	98.83% <ø> (ø)	⬆️
src/utils.js	94.2% <ø> (ø)	⬆️

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[foxhound87]

@rezzzet thank you for this PR, I have to write the tests before release it.

[foxhound87]

@rezzzet why did you added the build directory?

[svirschevskiy]

@foxhound87 oh, it was accidentally pushed to wrong branch. thanks for caught it.

[foxhound87]

🎉 This PR is included in version 1.35.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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