chore(deps): update dependency eslint-config-standard to v15 (#375)

* chore(deps): update dependency eslint-config-standard to v15

* style: fix lint error

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: wxsm <wxsms@foxmail.com>

package.json

@@ -46,7 +46,7 @@
     "cross-env": "7.0.2",
     "es6-object-assign": "1.1.0",
     "eslint": "7.11.0",
-    "eslint-config-standard": "14.1.1",
+    "eslint-config-standard": "15.0.0",
     "eslint-plugin-html": "6.1.0",
     "eslint-plugin-import": "2.22.1",
     "eslint-plugin-node": "11.1.0",

src/components/datepicker/DateView.js

@@ -89,10 +89,14 @@ export default {
             beforeTo = dateObj < this.limit.to
           }
           date.disabled = !afterFrom || !beforeTo
-          date.classes = isFunction(this.dateClass) ? this.dateClass(dateObj, {
-            currentMonth: this.month,
-            currentYear: this.year
-          }) : ''
+          if (isFunction(this.dateClass)) {
+            date.classes = this.dateClass(dateObj, {
+              currentMonth: this.month,
+              currentYear: this.year
+            })
+          } else {
+            date.classes = ''
+          }
           rows[i].push(date)
         }
       }

yarn.lock

@@ -1639,10 +1639,10 @@ escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   resolved "https://registry.npm.taobao.org/escape-string-regexp/download/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
   integrity sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=
 
-eslint-config-standard@14.1.1:
-  version "14.1.1"
-  resolved "https://registry.npm.taobao.org/eslint-config-standard/download/eslint-config-standard-14.1.1.tgz#830a8e44e7aef7de67464979ad06b406026c56ea"
-  integrity sha1-gwqOROeu995nRkl5rQa0BgJsVuo=
+eslint-config-standard@15.0.0:
+  version "15.0.0"
+  resolved "https://registry.npm.taobao.org/eslint-config-standard/download/eslint-config-standard-15.0.0.tgz?cache=0&sync_timestamp=1603330564670&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Feslint-config-standard%2Fdownload%2Feslint-config-standard-15.0.0.tgz#459f823b47ac0541b0a22b1d0a161a9da543f687"
+  integrity sha1-RZ+CO0esBUGwoisdChYanaVD9oc=
 
 eslint-import-resolver-node@^0.3.4:
   version "0.3.4"