neuralnetlib 4.3.4

• feat+fix(gan+compiles): metrics in compile + fixed labels in GAN
• refactor(gan): evaluate
• fix(gan): metrics handling
• fix(mmd): numerical instability
• refactor(gan): some improvements
• fix(dropout): input shape for gans
• feat(gan): add adaptive plot sample gen according to activation function
• docs(notebook): update gan example
• docs(readme): update transformer description
• fix(cgan): conditional handling in G/D
• fix(lr): add gan support
• feat: add balanced batch sampling
• fix(docs): notebook example for gan
• build: correct version
• fix: beam search