chore: v0.7 stable release

v0.6, roslyn 3.1

Fix mispelled word in error message

Load assemblies from consuming project's reference paths

As part of code generation, the Roslyn API may sometimes need to load an assembly referenced by the project being built. (ya, I know... scary). This allows us to resolve such assemblies.

Merge pull request #90 from AArnott/fix32

Evaluate real preprocessor symbols

Merge pull request #86 from AArnott/fix84

Target .NET Core 2.0 with the `dotnet-codegen` tool

Merge pull request #75 from LokiMidgard/Logger

Logger

Merge pull request #74 from AArnott/xunitRunnerUpdate

Update xunit test runner to 2.3.1

Merge pull request #70 from amis92/fix/commandline-inlining

Inline System.CommandLine into Tool project, closes #63

Merge pull request #67 from Pzixel/feature/global_attributes_generation

Assembly attributes support