Avoid encoding literal U+00E5 in python since it fails for windows-1251. Fixes #1403
Update to latest wptserve
Merge pull request #1413 from zcorpan/fix-1403

Avoid encoding literal U+00E5 in python since it fails for windows-1251....
minor fix to single-byte-encoder.html

Apparently ES requires new for these, but browsers haven’t been updated
yet.
Merge pull request #1419 from w3c/use-new-for-ArrayBuffer

minor fix to single-byte-encoder.html