Fix error with uint8array values in kv data

[gz65555]

Fix #78

According to the KTX spec:

• Key: UTF-8 encoded without BOM, terminated by a null character (0x00 byte)
• Value: Can be an arbitrary sequence of bytes (preferably a null-terminated UTF-8 string without BOM)
• Binary Value data: Sequence of bytes with multi-byte numbers in little-endian order
• String Value data: Null termination included in keyAndValueByteLength

I modified the write method. If it's a uint8array, I didn't write a termination character. And also modified the read method. If it's parsed as a string, I replaced the termination character (if any) using regex.

[codecov-commenter]

Codecov Report

Merging #81 (2a6b5c0) into main (ffc037f) will increase coverage by 0.11%. The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main      #81      +/-   ##
==========================================
+ Coverage   97.52%   97.64%   +0.11%     
==========================================
  Files           7        7              
  Lines         971      977       +6     
  Branches       38       38              
==========================================
+ Hits          947      954       +7     
+ Misses         24       23       -1     

Impacted Files	Coverage Δ
src/buffer-reader.ts	94.20% <100.00%> (+0.55%)	:arrow_up:
src/read.ts	98.61% <100.00%> (+<0.01%)	:arrow_up:
src/write.ts	94.57% <100.00%> (+0.42%)	:arrow_up:

[donmccurdy]

Thank you @gz65555! Published.