v4.0.0

• ⚠️ Breaking: drop CommonJS entry point and switch to ESM only for Node & bundlers + UMD bundle for browsers. #180
• ⚠️ Breaking: drop support for IE11 (you can still transpile on your end to keep it). #180
• Fix a rare edge case that could potentially lead to stack overflow by @district10 in #173 and @mlptownsend in #176
• Small performance optimizations by @vicb in #133, #132, #135
• Force getTile arguments as number by @andrewharvey in #128
• Fix a minor bug in tiling code by @CraigglesO in #130