code: function extractPackageVersion(inPath) {
      if (!inPath) {
          throw new Error('Input path argument is required');
      }
  
      // Require here so we have the update version.
      const pkg = fs.readFileSync(inPath, 'utf-8');
  
      // index 0 is line that matched, index 1 is first control group (version number in this case)
      const matches = /"version": "([0-9]+\.[0-9]+\.[0-9]+)"/.exec(pkg);
      const version = matches[1];
  
      return version;
  }
docs: Sync function that takes a package.json path and extracts the version from it.
  @param  {string} inPath Path to the project's package.json
  @return {string}        The extracted version number in the form 'X.Y.Z'