lemon: conan v2 support

[SpaceIm]

Specify library name and version: lib/1.0

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 2 (e02b1233b52b52a075cf890af56750c5d00fd542):

• lemon/3.32.3@:
  All packages built successfully! (All logs)

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Conan v2 pipeline (informative, not required for merge) ✔️

Note: Conan v2 builds are informative and they are not required for the PR to be merged.

All green in build 2 (e02b1233b52b52a075cf890af56750c5d00fd542):

• lemon/3.32.3@:
  All packages built successfully! (All logs)