v2.0.0

• Bump version to 2.0.0 1df9418
• Unsupport field alias 263291e
• Set the value to group.value instead of group.field if a tag group 4325f16
• Allow no delimiter group and remove invalid field of a group b989226
• Use whitespace as delimiter like Qiita 5c5cbee
• Add package-lock.json 0d324f8