Serilog Sinks File Versions Save

• #123 - update sourcelink support (@maciejw)
• #166 - support C# 8 nullable reference types; update targets/dependencies (fixing #104) (@rafaelsc)
• #141 - allow composition of FileLifecycleHooks (@EamonHetherton)
• #145 - improve docs (@cocowalla)
• #147 - fix validation of fileSizeLimit (@cocowalla)
• #167 - improve XDOCs (@rafaelsc)
• #190 - packaging updates (@augustoproiete)
• #189 - allow FileLifecycleHooks to observe opened filename (@augustoproiete)
• #196 - log to SelLog when path rolling fails (@pvandervelde)
• #222 - remove unnecessary dependencies (@bdovaz)
• #227 - unpin the assembly version (@nblumhardt)
• #210 - allow FileLifecycleHooks to (attempt to) set the underlying stream's length (@augustoproiete)

• #38, #50, #52 - documentation improvements (@nblumhardt, @bbrandt, @tsimbalar)
• #62 - fix package repository URL (@MaximRouiller)
• #65 - add SourceLink support (@lrushl)
• #76 - netstandard2.0 target (@vhatsura)
• #88 - avoid a first-chance exception when the log folder does not exist (@billrob)
• #80 - FileLifecycleHooks (@cocowalla)
• #107 - OnFileDeleting lifecycle hook (@nogard111)
• #111 - compile path matching regex (@SimonCropp)

• #35 - roll on year/month/day/hour/minute, file size, or a combination of both
• Slight modernization of the default output template (only when recompiling against the library; may be a breaking change for some file-based log collectors)

• #27 - Multiprocess shared files on .NET Core

• #24 - forward Stream.CanSeek when write-counting wrapper is applied so that spurious encoding preambles are not written

• #18 - flush-to-disk option
• #22 - synchronize file stream disposal
• #18 (included) - fix size limiting of shared log files

• #16 - allow shared log files to be concurrently read as well as written

• #12 - Audit logging support
• #7 - Multi-process shared files
• #13 - Character counting efficiency improvement (throughput improved over 2.x by about 30%)

#10 - Default encoding without BOM