fix: Auto-detect the version of the JSON Schema draft by default

Author: prantlf

README.md

@@ -60,15 +60,15 @@ or process all `.json` files in a directory:
       -S, --single-quoted-strings  support single quotes as string delimiters
       -V, --validate [file]        JSON schema file to use for validation
       -e, --environment [env]      which specification of JSON Schema the validation
-                                   file uses (default: "json-schema-draft-03")
+                                   file uses
       -q, --quiet                  do not print the parsed json to stdin
       -p, --pretty-print           force pretty-printing even for invalid input
       -v, --version                output the version number
       -h, --help                   output usage information
 
     If no files or directories are specified, stdin will be parsed. Environments
     for JSON schema validation are "json-schema-draft-04", "json-schema-draft-06"
-    or "json-schema-draft-07".
+    or "json-schema-draft-07". If not specified, it will be auto-detected.
 
 ## Module Interface
 

lib/cli.js

@@ -24,15 +24,15 @@ var options = require('commander')
   .option('-C, --comments', 'recognize and ignore JavaScript-style comments')
   .option('-S, --single-quoted-strings', 'support single quotes as string delimiters')
   .option('-V, --validate [file]', 'JSON schema file to use for validation')
-  .option('-e, --environment [env]', 'which specification of JSON Schema the validation file uses', 'json-schema-draft-03')
+  .option('-e, --environment [env]', 'which specification of JSON Schema the validation file uses')
   .option('-q, --quiet', 'do not print the parsed json to stdin')
   .option('-p, --pretty-print', 'force pretty-printing even for invalid input')
   .version(pkg.version, '-v, --version')
   .on('--help', () => {
     console.log()
     console.log('If no files or directories are specified, stdin will be parsed. Environments')
     console.log('for JSON schema validation are "json-schema-draft-04", "json-schema-draft-06"')
-    console.log('or "json-schema-draft-07".')
+    console.log('or "json-schema-draft-07". If not specified, it will be auto-detected.')
   })
   .parse(process.argv)