Updating rquickjs from 0.6.1 to 0.8.1

[jeffcharles]

I'm going to document the issues I ran into trying to update rquickjs here.

1. Turning on the SIMD implementation for JSON seems to cause at least one test262 failure
2. Fuel increases in tests
3. We still need to investigate if there are breaking changes to the QuickJS bytecode so we know whether we need to cut new major versions of the javy and javy-plugin-api crates and increment the plugin version.

The test262 failure I'm seeing is in the file crates/javy/test262/test/built-ins/JSON/stringify/value-bigint.js and the error message is Expected a TypeError to be thrown but no exception was thrown at all.

For the fuel increases:

Test	Target fuel	New fuel	Increase %
test_encoding	258197	270087	4.6%
test_exported_functions	61404	63518	3.4%
test_identity	47773	50760	6.3%
test_empty	22590	24554	8.7%
test_exported_default_arrow_fn	39004	40038	2.7%
test_exported_default_fn	39951	40933	2.5%
test_fib	64681	71302	10.2%
test_logging_with_redirect	35007	37709	7.8%
test_logging_without_redirect	36641	37592	2.6%
test_recursive_fib	69306	76848	10.9%
test_readme_script	254503	271684	6.8%
test_str	146027	154404	5.7%