feat: add reflectorOffset to MeshReflectorMaterial (pmndrs#722)

fix: gradienttexture was missing the encoding

fix: contactshadows was missing a second pass

fix: instance perf issue, neglecting draw range

fix(core): remove usage of RGBFormat (pmndrs#742)

fix: controls

fix: update dependencies to support r137 RGBFormat deletion (pmndrs#741)

feat: update three-stdlib to v2.7.2 (pmndrs#726)

fix: use npm instead of three/examples (pmndrs#737)

The library stats.js is imported but we do not use it, instead three/examples is used

fix: apparently premgenerator is not needed in threejs any longer