Features: Proxy, Reflect (See pull/1643) (#1646)

test/built-ins/Proxy/apply/call-parameters.js

test/built-ins/Proxy/apply/call-result.js

test/built-ins/Proxy/apply/null-handler.js

test/built-ins/Proxy/apply/return-abrupt.js

test/built-ins/Proxy/apply/trap-is-not-callable-realm.js

test/built-ins/Proxy/apply/trap-is-not-callable.js

test/built-ins/Proxy/apply/trap-is-null.js

test/built-ins/Proxy/apply/trap-is-undefined-no-property.js

test/built-ins/Proxy/apply/trap-is-undefined.js

test/built-ins/Proxy/construct/call-parameters-new-target.js

test/built-ins/Proxy/construct/call-parameters.js

test/built-ins/Proxy/construct/call-result.js

test/built-ins/Proxy/construct/null-handler.js

test/built-ins/Proxy/construct/return-is-abrupt.js

...t-ins/Proxy/construct/return-not-object-throws-boolean.js

...lt-ins/Proxy/construct/return-not-object-throws-number.js

...lt-ins/Proxy/construct/return-not-object-throws-string.js

...lt-ins/Proxy/construct/return-not-object-throws-symbol.js

...ins/Proxy/construct/return-not-object-throws-undefined.js

test/built-ins/Proxy/construct/trap-is-not-callable-realm.js