chore(perf): only use the regular expression for shorter input

[nigrosimone]

Only use the regular expression STR_ESCAPE for shorter input. The overhead is otherwise too much.

Before

long string without double quotes........................ x 9,395 ops/sec ±6.66% (136 runs sampled)
long string.............................................. x 7,237 ops/sec ±2.61% (175 runs sampled)

After

long string without double quotes........................ x 13,095 ops/sec ±1.26% (184 runs sampled)
long string.............................................. x 13,734 ops/sec ±1.65% (179 runs sampled)

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[gurgunday]

lgtm, @Uzlopak?

[mcollina]

lgtm

[cesco69]

@mcollina Any plan for a new version? there are some "merged" performance improvement

#691
#689
#688
#686