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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Deprecate AST version 40

Add a unique id to declarations in version 45+

For issue #58

The output of `var_dump(ast\parse_code('<?php function(){};function(){};', 45));`

will include '__declId' value

Add a unique id to declarations in version 45+

For issue #58

The output of `var_dump(ast\parse_code('<?php function(){};function(){};', 45));`

will include '__declId' values starting from 0.
The counter will reset if `parse_code` is called again,

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Deprecate version 30

Deprecate version 15

Switching tests to version 30 where possible.

Make $version argument required

[bc-break]

Determine flag name when dumping

I don't know by heart which flag 67108864 is...

Fix leaks, add some tests

Show return type hints

Decls now have 4 children and the last one is a name.

Don't dump linenos by default

For most purposes this is just noise.

In the test it looks like the lineno for AST_ARG_LIST is not being
computed correctly :/

Make test independent of ast_dump implementation

Tests shouldn't break when changing it...

Fix test

More compact AST dump

Drop those {}

Use underscores for function names

Update README with some info

Add test