Make typeof throw when accessing uninitialized variables

[raskad]

This Pull Request changes the following:

• Make typeof throw when accessing uninitialized variables

Currently typeof returns undefined when accessing uninitialized bindings like const, let, class.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,601	94,601	0
Passed	73,298	73,328	+30
Ignored	17,540	17,540	0
Failed	3,763	3,733	-30
Panics	0	0	0
Conformance	77.48%	77.51%	+0.03%

Fixed tests (30):

test/language/module-code/instn-local-bndng-let.js [strict mode] (previously Failed)
test/language/module-code/instn-local-bndng-let.js (previously Failed)
test/language/module-code/instn-local-bndng-cls.js [strict mode] (previously Failed)
test/language/module-code/instn-local-bndng-cls.js (previously Failed)
test/language/module-code/instn-local-bndng-const.js [strict mode] (previously Failed)
test/language/module-code/instn-local-bndng-const.js (previously Failed)
test/language/eval-code/direct/lex-env-no-init-let.js [strict mode] (previously Failed)
test/language/eval-code/direct/lex-env-no-init-let.js (previously Failed)
test/language/eval-code/direct/lex-env-no-init-cls.js [strict mode] (previously Failed)
test/language/eval-code/direct/lex-env-no-init-cls.js (previously Failed)
test/language/eval-code/direct/lex-env-no-init-const.js [strict mode] (previously Failed)
test/language/eval-code/direct/lex-env-no-init-const.js (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-let.js [strict mode] (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-let.js (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-cls.js [strict mode] (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-cls.js (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-const.js [strict mode] (previously Failed)
test/language/eval-code/indirect/lex-env-no-init-const.js (previously Failed)
test/language/statements/for-of/scope-head-lex-close.js [strict mode] (previously Failed)
test/language/statements/for-of/scope-head-lex-close.js (previously Failed)
test/language/statements/for-of/scope-head-lex-open.js [strict mode] (previously Failed)
test/language/statements/for-of/scope-head-lex-open.js (previously Failed)
test/language/statements/for-of/scope-body-lex-open.js [strict mode] (previously Failed)
test/language/statements/for-of/scope-body-lex-open.js (previously Failed)
test/language/statements/for-in/scope-head-lex-close.js [strict mode] (previously Failed)
test/language/statements/for-in/scope-head-lex-close.js (previously Failed)
test/language/statements/for-in/scope-head-lex-open.js [strict mode] (previously Failed)
test/language/statements/for-in/scope-head-lex-open.js (previously Failed)
test/language/statements/for-in/scope-body-lex-open.js [strict mode] (previously Failed)
test/language/statements/for-in/scope-body-lex-open.js (previously Failed)

[Razican]

Nice change!

[HalidOdat]

Nice catch!

[jedel1043]

Good catch :)