Merge pull request #1359 from leobalter/class-private-tags

src/class-fields/eval-err-contains-supercall-1.case

src/class-fields/eval-err-contains-supercall-2.case

src/class-fields/eval-err-contains-supercall.case

src/class-fields/eval-err-contains-superproperty-1.case

src/class-fields/eval-err-contains-superproperty-2.case

src/class-fields/init-err-contains-arguments.case

src/class-fields/init-err-contains-super.case

...tializer-error/cls-decl-fields-private-arrow-fnc.template

...s/initializer-error/cls-decl-fields-private-name.template

...nitializer-error/cls-decl-fields-private-ternary.template

...initializer-error/cls-decl-fields-private-typeof.template

...alizer-error/cls-decl-fields-static-private-name.template

...tializer-error/cls-expr-fields-private-arrow-fnc.template

...s/initializer-error/cls-expr-fields-private-name.template

...nitializer-error/cls-expr-fields-private-ternary.template

...initializer-error/cls-expr-fields-private-typeof.template

...alizer-error/cls-expr-fields-static-private-name.template

src/class-fields/member-expression-privatename.case

src/class-fields/private-names.case

...s/productions/cls-decl-after-same-line-async-gen.template