update ci.yml to test Nim 2.2; also test gcc-14

[narimiran]

No description provided.

[tersec]

https://github.com/status-im/nim-confutils/actions/runs/10831206907/job/30333175040?pr=105 from CI / linux-amd64 (Nim version-2-0) (pull_request)

[NimScript] exec: nim c  --styleCheck:usages --styleCheck:error --verbosity:0 --hints:off --skipParentCfg --skipUserCfg --outdir:build --nimcache:build/nimcache -f  --threads:off --mm:refc -r tests/test_all
/home/runner/work/nim-confutils/nim-confutils/tests/test_config_file.nim(183, 3) template/generic instantiation of `suite` from here
/home/runner/work/nim-confutils/nim-confutils/tests/test_config_file.nim(186, 5) template/generic instantiation of `test` from here
/home/runner/.nimble/pkgs2/unittest2-0.2.2-6ac7f7ea74df812a25be5d6d36a59d23789eb508/unittest2.nim(1127, 24) template/generic instantiation of `failingOnExceptions` from here
/home/runner/.nimble/pkgs2/unittest2-0.2.2-6ac7f7ea74df812a25be5d6d36a59d23789eb508/unittest2.nim(1131, 26) template/generic instantiation of `failingOnExceptions` from here
/home/runner/work/nim-confutils/nim-confutils/tests/test_config_file.nim(187, 26) template/generic instantiation of `load` from here
/home/runner/work/nim-confutils/nim-confutils/tests/test_config_file.nim(193, 18) template/generic instantiation of `addConfigFile` from here
/home/runner/work/nim-confutils/nim-confutils/confutils.nim(874, 39) template/generic instantiation of `loadFile` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization.nim(155, 13) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization.nim(31, 9) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization/reader.nim(424, 8) template/generic instantiation of `decodeInlineTable` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization/reader.nim(332, 25) template/generic instantiation of `parseInlineTableImpl` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization/reader.nim(334, 21) template/generic instantiation of `fieldReadersTable` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization/object_serialization.nim(261, 34) template/generic instantiation of `makeFieldReadersTable` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization/object_serialization.nim(221, 26) template/generic instantiation of `enumAllSerializedFields` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization/object_serialization.nim(155, 32) template/generic instantiation of `enumAllSerializedFieldsImpl` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization/object_serialization.nim(239, 52) template/generic instantiation of `readFieldIMPL` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization/object_serialization.nim(206, 13) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization.nim(31, 9) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization/reader.nim(374, 19) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/serialization-0.2.2-7d65be9aa3c3249957ee779435e7093367ad719d/serialization.nim(31, 9) template/generic instantiation of `readValue` from here
/home/runner/.nimble/pkgs2/toml_serialization-0.2.12-8311cc9fd9e5fa18e1fccdfe20a39d81d800e5ba/toml_serialization/reader.nim(430, 12) Error: Failed to convert from TOML an unsupported type: InputFile
stack trace: (most recent call last)

is nim-lang/Nim#24163

[metagn]

Opened issue for 2.2/devel failure: nim-lang/Nim#24164