Library crashes for devices without high float precision fragment shader support

[oscarlorentzon]

mapillary-js version: 1.0.0 - 2.9.0

Steps to Reproduce Behavior

1. Load a web page with an MJS viewer in a browser with medium float precision fragment shader support.

Expected Behavior

Everything works, it is possible to navigate between images in the viewer.

Actual Behavior

MJS crashes with a shader compilation error in WebGL with a black screen but visible navigation arrows as a result. High float precision in browser is currently required for shaders to compile.