Chuck Jazdzewski a75040d0a1 refactor(compiler): bump metadata version to 4 (#19338)
Also adds auto upgrade from lower version based
on the .d.ts file (e.g. from version 3 to 4).

This is needed as we are now also capturing type aliases
in metadata files (and we rely on this),
see 6e3498ca8e6752c0d59c19c89e3211744e80f6d8.
2017-09-26 13:31:59 -07:00
..