Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/posix-character-classes/index.js

@@ -0,0 +1,22 @@
+'use strict';
+
+/**
+ * POSIX character classes
+ */
+
+module.exports = {
+  alnum: 'a-zA-Z0-9',
+  alpha: 'a-zA-Z',
+  ascii: '\\x00-\\x7F',
+  blank: ' \\t',
+  cntrl: '\\x00-\\x1F\\x7F',
+  digit: '0-9',
+  graph: '\\x21-\\x7E',
+  lower: 'a-z',
+  print: '\\x20-\\x7E ',
+  punct: '\\-!"#$%&\'()\\*+,./:;<=>?@[\\]^_`{|}~',
+  space: ' \\t\\r\\n\\v\\f',
+  upper: 'A-Z',
+  word: 'A-Za-z0-9_',
+  xdigit: 'A-Fa-f0-9'
+};