cmake_minimum_required is now 3.19

[randaz81]

cmake_minimum_required is now 3.19

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Coverage summary from Codacy

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Coverage variation	Diff coverage
:white_check_mark: +0.00%	:white_check_mark: ∅

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (ac33ace3e54ea3ec34c4faf479156e3d734889e2) | 107672 | 58237 | 54.09% | | | Head commit (ba2f4797400bb15d7ce5a3e95b6240076a9bafa7) | 107672 (+0) | 58235 (-2) | 54.09% (**+0.00%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#3076) | 0 | 0 | **∅ (not applicable)** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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[PeterBowman]

@randaz81 I just noticed that the following lines (and similar) can be deleted now:

https://github.com/robotology/yarp/blob/8d2d4a0f9194f0c54fefea725f0b070e7561dac4/CMakeLists.txt#L7-L15