update package version and supported Unity version due to localization support

Author: hiroki-o

package.json

@@ -1,8 +1,8 @@
 {
 	"name": "com.unity.springbone",
 	"displayName": "Unity Chan Spring Bone",
-	"version": "1.1.0-preview",
-	"unity": "2018.3",
+	"version": "1.2.0-preview",
+	"unity": "2019.4",
 	"description": "Sping Bone System for lightweight secondary animations.",
 	"keywords": ["animation"],
 	"category": "Animation",