v0.8.0

Release notes

• Migrate to powsybl-core 3.8.0 (#175)
• Discrete controls:
  • Phase control: remote active power mode (#153, #166, #173)
  • Voltage remote and local control for transformers (#127, #173)
• Voltage limit violations corrections (#164)
• Power factor constant on loads during slack distribution if corresponding parameter enabled (#170)
• Bump GraalVM to 20.3.0 (#174)
• Readme update (#165)
• Tests correction: using same junit version (#169)