bump(mesonlsp): update to v4.3.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
mesonlsp	minor	v4.2.2 -> v4.3.0

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Release Notes

JCWasmx86/mesonlsp (mesonlsp)

### [`v4.3.0`](https://togithub.com/JCWasmx86/mesonlsp/releases/tag/v4.3.0): Release 4.3.0 [Compare Source](https://togithub.com/JCWasmx86/mesonlsp/compare/v4.2.2...v4.3.0) - Add support for specifying custom `subproject_dir` (top level directory name that holds Meson subprojects) ([#​88](https://togithub.com/JCWasmx86/mesonlsp/issues/88), by [@​fourdim](https://togithub.com/fourdim)) - Fix code formatting duplicating the last line when meson.build has fewer lines ([#​101](https://togithub.com/JCWasmx86/mesonlsp/issues/101)) - Fix malformed entries in completion list ([#​92](https://togithub.com/JCWasmx86/mesonlsp/issues/92)) - Deduplicate completion list ([#​92](https://togithub.com/JCWasmx86/mesonlsp/issues/92)) - Fix missing error, if an unknown variable is used as argument for a kwarg with the same name as the kwarg itself. - Add missing constants from reference tables ([#​103](https://togithub.com/JCWasmx86/mesonlsp/issues/103), by [@​blue42u](https://togithub.com/blue42u)) - Add partial support for `str.replace()` in the interpreter (Fixes parsing of [Lix](https://git.lix.systems/lix-project/lix)) - Update API compat to 1.5.0rc1

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