feat(main): add rule of 'maxLength' and 'minLength'

Author: isuke

.git_consistent

@@ -66,6 +66,7 @@ subject:
     firstLatter: lower
     dotAtEnd: false
     nonAscii: false
+    minLength: 10
 issueKeyword:
   type: branch
   required: false

README.adoc

@@ -379,6 +379,14 @@ link:https://github.com/isuke/git-consistent/blob/master/sample_type_list.adoc[s
 | `numberOnly`
 | number only?
 | boolean
+
+| `maxLength`
+| max length of string
+| integer
+
+| `minLength`
+| min length of string
+| integer
 |===
 
 == Command options

lib/main.js

@@ -96,13 +96,23 @@ const checkValue = (term, value, definition) => {
       case 'nonAscii':
       case 'notAscii':
       case 'ascii':
-        if(ruleName === 'ascii') {
+        if (ruleName === 'ascii') {
           console.log(`${colors.warning}[Deprecated Warning] 'ascii' rule renamed 'nonAscii' (the meaning does not change).${colors.reset}`)
         }
         if (!ruleSetting && /[^\x00-\x7F]/.test(value)) {
           errorMessages.push(`${term} should only ascii symbols.`)
         }
         break
+      case 'maxLength':
+        if (ruleSetting < value.length) {
+          errorMessages.push(`${term} length is '${value.length}' but max length is '${ruleSetting}'.`)
+        }
+        break
+      case 'minLength':
+        if (ruleSetting > value.length) {
+          errorMessages.push(`${term} length is '${value.length}' but min length is '${ruleSetting}'.`)
+        }
+        break
       default:
         throw new Error(`${ruleName} is not defined.`)
     }