Bump test262

[dnalborczyk]

before:

Summary:
 ✔ 92611 valid programs parsed without error
 ✔ 8348 invalid programs produced a parsing error
 ✔ 0 invalid programs did not produce a parsing error (and allowed by the whitelist file)
 ✔ 11 valid programs produced a parsing error (and allowed by the whitelist file)
 ✔ 896 programs were skipped

after:

Summary:
 ✔ 93636 valid programs parsed without error
 ✔ 8360 invalid programs produced a parsing error
 ✔ 0 invalid programs did not produce a parsing error (and allowed by the whitelist file)
 ✔ 7 valid programs produced a parsing error (and allowed by the whitelist file)
 ✔ 936 programs were skipped

[marijnh]

Thank you!