v1.2.0

• Add class MhaKMeansTuner that can tune hyper-parameters of KMeans model using Metaheuristic Algorithms (MHAs)
• Add class MhaKCentersClustering that can optimize the center weights of KMeans model using MHAs
• Update required version of mealpy to 3.0.1
• Update documents, examples, ChangeLog.md, CITATION.cff, README.md