style: cleanup tests

Merge pull request paulmach#75 from paulmach/knearest-sort

quadtree: sort KNearest results closest first

Merge pull request paulmach#66 from si3nloong/master

📦️ chore: bump dependencies

encoding/mvt: remove github.com/pkg/errors as a dependency

geojson: don't error on nil geometry

okay as per the spec https://tools.ietf.org/html/rfc7946#section-3.2

update gogo/protobuf and pkg/errors dependencies

Fix UnmarshalFeature

- GeometryCollection cannot unmarshal

wkb scanner: support hex encoded data from go-pg

add go.mod

encoding/wkb: only limit multi allocations not read length