…ble in the current scope (#17810)

[release-2.5] Fix emit for leading 'var' declarations for synthesized namespaces

* Allow use before declaration for export= assignments (#17967)

* Add release-2.5 to covered branches

* Bind logger function before using

* Use lambda isntead of bind

* No contextual return type when type is circular

* Add regression test

Object literal elements that are neither spread elements, nor property assignments would not have visitNode called on them. Therefore, the esnext transformer would not be called on them and their children.

Fixes #16765.

See #16765.

…ement (#18028) (#18033)

* Call dynamic import transform on expression used by export equal statement

* Use Debug.fail

…#18032) (#18034)

* There should be no crash when attempting to merge an import with a local declaration

* Show symbol has actually merged within the module

… for extracting method to file (#18030) (#18044)

* Test for action description of code actions, and simplify description for extracting method to file

* Add unit test file missing from tsconfig.json (only affects gulp) and update tests

* Use the actual number

* Use "module scope" or "global scope" instead of "this file"

…Metadata

* Probably fix 18224

* Corrected test

* Ensure that emitter calls calbacks

* Move new parameter to end of parameters

* Fix for ConditionalExpression

* Make suggested changes to emitter

* Fix parameter ordering

* Respond to minor comments

* Remove potentially expensive assertion

* More emitter cleanup

Also remove JSDocTypeLiteral.jsdocTypeTag, which made no sense since it
was only useful when storing information for its parent `@typedef` tag.

If we send them all at once, we (apparently) hit a buffer limit in the
node IPC channel and both TS Server and the typings installer become
unresponsive.