v0.0.2

Changes since v0.0.1:

• Update testsuite; fix most issues (#13)
• Add new SIMD instructions (#15)
• Support rtt.{canon,sub} in constant expressions (#16)
• Add {binary,text}::InstructionKind enum (#17)
• Use Abseil; remove fmt/span-lite/phmap (#19)
• Rename .def files to .inc files (#20)
• Add binary::FuncBindImmediate (#18)
• Implement ToText, for converting binary -> text (#21)