v0.2.0.0

0.2.0.0 -- 2020-12-15

• Add Z.Data.Text.Regex module, which provide regex functions using RE2.
• Rename buildBytes, buildBytesList in Z.Data.Builder to build, buildChunks.
• Rename encodeBytes, encodeBytesList in Z.Data.Builder to encode, encodeChunks.
• buildChunks now produces a lazy bytes list, (so that encodeChunks, etc.).
• Functions in Z.Data.Text.Search now return char index by default, add findBytesIndices/findBytesIndex/R to
  search for bytes index.
• Add fromStdString to Z.Foreign to marshall std::string from c++ code.