Fix bug in CombinedConfig: need to allow for config values not defined in the possible CLI args.

cliutils.nim

@@ -15,7 +15,7 @@ proc getVal*(cfg: CombinedConfig, key: string): string =
   let envKey = key.replace('-', '_').toUpper
   let jsonKey = key.replace(re"(-\w)", proc (m: RegexMatch): string = ($m)[1..1].toUpper)
 
-  if cfg.docopt[argKey]: return $cfg.docopt[argKey]
+  if cfg.docopt.contains(argKey) and cfg.docopt[argKey]: return $cfg.docopt[argKey]
   elif existsEnv(envKey): return getEnv(envKey)
   elif cfg.json.hasKey(jsonKey):
     let node = cfg.json[jsonKey]

cliutils.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.6.2"
+version       = "0.6.3"
 author        = "Jonathan Bernard"
 description   = "Helper functions for writing command line interfaces."
 license       = "MIT"