Like shell substitution but for your JS.
var substitute = require('shellsubstitute');
substitute('Hi $USER', {USER: 'Josh'}) // Hi Josh
substitute('Hi ${USER}', {USER: 'Josh'}) // Hi Josh
// escape
substitute('Hi \\$USER', {USER: 'Josh'}) // Hi $USER
substitute('Hi \\${USER}', {USER: 'Josh'}) // Hi ${USER}
// escape escapes
substitute('Hi \\\\$USER', {USER: 'Josh'}) // Hi \$USER
substitute('Hi \\\\${USER}', {USER: 'Josh'}) // Hi \${USER}
Variables are $ followed by _ or numbers 0-9 or upper or lower-case characters a-z.
Variables can be wrapped in braces {...}. Useful to delimit the variable from following text.
