message: Read old version number during version bump from the old version file.
diff: @@ -36,6 +36,8 @@ _.forEach(config.docFilesPaths, function(currDocPath) {
  console.log("bumping unpkg link in: <" + config.readmePath + ">")
  console.log("bumping version on <" + config.versionPath + ">")
  +
  +const oldVersion = require("../lib/src/version").VERSION
  const oldVersionRegExpGlobal = new RegExp(oldVersion, "g")
  const bumpedVersionTsFileContents = config.apiString.replace(
  /\d+\.\d+\.\d+/g,
  