New version v0.19.0

Building system

First version using meson as building system.

What's Changed

• Added pocoMC to rosenbrock_simple.ipynb. by @vitenti in #112
• 109 example describing 3d correlation by @vitenti in #113
• Now MPI jobs do not require setting nthreads. by @vitenti in #115
• Improving documentation and encapsulating objects by @vitenti in #116
• Creating tests and documentation for n-dimensional integration object by @eduardojsbarroso in #108
• Kde loocv by @vitenti in #118
• Minor improvements, adding nautilus to sampler comparisons. by @vitenti in #119
• Moving to meson by @vitenti in #120

Full Changelog: v0.18.2...v0.19.0