v0.3.0

What's Changed

• Refactor API by @julien-michot in #5
• Fix timeout unit test and numerical differentiation when returning a scalar by @julien-michot in #6
• Add Perceptron with gradient descent unit test by @julien-michot in #7
• Add Tinyopt benchmarks by @julien-michot in #8
• Add activations and classical norms by @julien-michot in #9
• Fix auto diff compilation and add Evaluate by @julien-michot in #10
• Add Mahalanobis distance by @julien-michot in #11
• Add distance function dist(a,b) by @julien-michot in #12
• Small semi-cleanup, make sure GD gets a scalar error by @julien-michot in #13

Full Changelog: v0.2.1...v0.3.0