message: Lighter regex dependency.
  Detail on
diff: @@ -16,7 +16,7 @@ edition = "2018"
  base64 = "0.10.0"
  byteorder = "1.0"
  once_cell = "1.0"
  -regex = "1.0"
  +regex ={version = "1.3.0", default-features = false, features = ["std"]}
  tantivy-fst = "0.1"
  memmap = {version = "0.7", optional=true}
  lz4 = {version="1.20", optional=true}
  @@ -84,6 +84,7 @@ wasm-bindgen = ["uuid/wasm-bindgen"]
  travis-ci = { repository = "tantivy-search/tantivy" }
  [dev-dependencies.fail]
  +version = "0.3"
  features = ["failpoints"]
  # Following the "fail" crate best practises, we isolate
  