chore: change license to apache v2

[gxcsoccer]

change license from MIT to Apache License V2

[codecov-io]

Codecov Report

Merging #9 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #9   +/-   ##
=======================================
  Coverage   96.12%   96.12%           
=======================================
  Files          34       34           
  Lines        1239     1239           
=======================================
  Hits         1191     1191           
  Misses         48       48

Impacted Files	Coverage Δ
.../serialize/hessian/primitive_type/java.util.map.js	98.21% <ø> (ø)	⬆️
...sian/primitive_type/java.lang.stacktraceelement.js	100% <ø> (ø)	⬆️
...serialize/hessian/primitive_type/java.util.list.js	100% <ø> (ø)	⬆️
...erialize/hessian/primitive_type/java.lang.class.js	100% <ø> (ø)	⬆️
lib/protocol/request.js	95.06% <ø> (ø)	⬆️
...ize/hessian/primitive_type/java.math.bigdecimal.js	100% <ø> (ø)	⬆️
...rialize/hessian/primitive_type/java.lang.string.js	100% <ø> (ø)	⬆️
lib/serialize/hessian/primitive_type/custom_map.js	98.31% <ø> (ø)	⬆️
...rialize/hessian/primitive_type/java.lang.object.js	100% <ø> (ø)	⬆️
...lize/hessian/primitive_type/java.lang.exception.js	100% <ø> (ø)	⬆️
... and 24 more

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[beiwei30]

LGTM