v2.10.0

• #1370, #1374 - improve test coverage (@rafaelsc)
• #1371, #1377, #1429, #1445 - documentation updates (@perjahn, @morgankenyon, @rafaelsc, @JakenVeina)
• #1378, #1392 - build fixes (@nblumhardt)
• #1477 - don't fail to log when ToString() throws an exception (@rafaelsc)
• #1435 - netstandard2.1 support and default implementations for ILogger methods (@skomis-mm)
• #1442 - MinimumLevel.Override() runtime optimizations (@skomis-mm)
• #1463 - fix disposal of wrapped sinks through LoggerSinkConfiguration.Wrap()
• #1449 - allow exceptions to bubble up through wrapped aggregate sinks (@augustoproiete)
• #1466 - internal wrapper sink refactoring (@nblumhardt)
• #1427, #1452, #1467 - when ToString() on a logged object returns null, serialize as "" (@rafaelsc, @nblumhardt)
• #1472 - improve handling of minimum level overrides in sub-loggers (@skomis-mm)