4.21.2: fix --preg-with-matches migration

v4.21.2

fix --preg-with-matches migration

4.21.1: actually add --preg-with-matches migration

Adds a change that was accidentally omitted from the previous release.

4.21.0: support and require HHVM 4.21+

HHVM 4.21 removes support for instanceof and __destruct, adds some experimental syntax.

4.15.5: fix --preg-with-matches migration

v4.15.5

fix --preg-with-matches migration

4.15.4: actually add --preg-with-matches migration

Adds a change that was accidentally omitted from the previous release.

4.15.3: add --preg-with-matches migration

Migrates preg_match() and preg_match_all() calls with a by-ref/inout $matches argument to preg_match_with_matches() and preg_match_all_with_matches() with an inout argument.

4.15.2: new migration for HHVM 4.20+

This release adds a migration for HH_FIXME[4110] required by HHVM 4.20+.

Support current nightlies (4.17-dev)

This release continues to support 4.15 and 4.16, and additionally is compatible with hhvm-nightly-2019.08.01

4.15: support and require HHVM 4.15

This release is identical to v4.14.4, except that it adapts to AST changes in HHVM 4.15

4.14.4: more migrations, and error message improvements

This release:

• adds hhast-migrate --top-level-requires, to move top-level requires to <<__EntryPoint>> functions
• makes hhast-migrate --instanceof-is also migrate expressions of the form instanceof <expression> (e.g. instanceof $what) into \is_a() function calls; neither instanceof or is_a() refine the type for the typechecker.