v0.4.0

BinaryBuilderBase v0.4.0

Diff since v0.3.1

Merged pull requests:

• Use -mtune=generic for x84-64 microarchitecture (#8) (@giordano)
• mkdir target directory when copying for DirectorySource (#15) (@mortenpi)
• Remove at-ref to BinaryBuilder.build_tarballs (#16) (@mortenpi)
• Add GNU_LIBC_VERSION to the mappings of the build environment (#17) (@giordano)
• Small reproducibility improvement (#18) (@staticfloat)
• Rebuild mingw shards with new dlltool patch (#19) (@staticfloat)
• Default to more explicit dlopen_flags_str(). (#20) (@staticfloat)
• Don't try to fix up double-dashed commands in ar like --version (#21) (@staticfloat)
• Switch Base.have_color to get(stdout, :color, false) (#22) (@staticfloat)
• Shard Bump (#23) (@staticfloat)