Add encaps var flags for AST_DIM/AST_VAR for php 8.2 (#227)

For https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation

Closes #224

In util.php: Don't print a

Add encaps var flags for AST_DIM/AST_VAR for php 8.2 (#227)

For https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation

Closes #224

In util.php: Don't print a 0 flag value for combinable flags

For php-ast self-testing, minimize the number of changes in the future
when similar combinable flags get added to existing ast var types.

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php-ast 1.1.0dev: Deprecate AST versions 50 and 60, drop support for php < 7.2 (#185)

* Deprecate AST versions 50 and 60

AST version 70 has been supported since php-ast 1.0.1 (2019-

php-ast 1.1.0dev: Deprecate AST versions 50 and 60, drop support for php < 7.2 (#185)

* Deprecate AST versions 50 and 60

AST version 70 has been supported since php-ast 1.0.1 (2019-02-11).

Related to #114

* Drop support for php <= 7.1

Update documentation to mention this.

* Update test expectation for AST version 60 deprecation

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Emulate PHP 7.0 CONST_ELEM docComment only in version >= 60

Deprecate AST version 40

Update tests for master

Class and function flags have been renumbered, so don't match
against exact values.

Deprecate version 30

Deprecate version 15

Switching tests to version 30 where possible.

Support PHP 7.1 class constant visibility

a) CLASS_CONST_DECL now uses modifier flags. For PHP < 7.1 we
emuate MODIFIER_PUBLIC here for consistency.
b) CONST_ELEM can now have a d

Support PHP 7.1 class constant visibility

a) CLASS_CONST_DECL now uses modifier flags. For PHP < 7.1 we
emuate MODIFIER_PUBLIC here for consistency.
b) CONST_ELEM can now have a docComment properts (in analog to the
property on PROP_ELEM).

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Make $version argument required

[bc-break]

Actually add the test...