fix digit escapes in java & php highlights

[the-mikedavis]

A bit confusingly, the \d escape actually needs to be \\d to get picked up as the digit escape. As far as I can tell the \d just gets ignored. The java regex correctly matches constants but only because it doesn't end the regex with $. The PHP highlight currently mistreats the PI_314 in the following:

<?php
define("PI_314", 3.14);
echo PI_314;
?>

as a @constructor instead of a @constant.

connects #845

[archseer]

Hmm interesting. These queries are verbatim from upstream tree-sitter grammars so you might want to raise an issue there too?

[the-mikedavis]

Followed up with these PRs to the upstreams 👍

• fix digit escape in highlight regex for constants tree-sitter/tree-sitter-java#90
• fix digit escape in highlight regex for constants tree-sitter/tree-sitter-php#112