1.0.0-rc.3

Area:Api

• Async APIs / Fake Async Codecs - #1196 via @tocsoft, @JimBobSquarePants

Bug

• Only throw for multi SOF when fully decoding. - #1226 via @JimBobSquarePants
• Update Adler32 to correctly filter intrinsics. - #1229 via @JimBobSquarePants
• Use ConcurrentDictionary for options properties. - #1234 via @JimBobSquarePants

Area:Build

• Bump Gitversion - #1232 via @JimBobSquarePants

Other

• Update README.md - #1216 via @shaggygi
• Use MemoryAllocator in FixedCapacityPooledMemoryStream - #1223 via @antonfirsov
• Tests for FixedCapacityPooledMemoryStream - #1225 via @antonfirsov
• Added Third Party Notices document - #1236 via @Turnerj, @JimBobSquarePants