Member “length“ is read-only and cannot be used to resize arrays.

• Member “length” is read-only and cannot be used to resize arrays.
  这个错误是说明，在sodility语言更新后，好像是0.6.0之后你不能够动态地修改它数组的长度，下面举个例子

uint[] private data;
funciton put() public returns(){
   
	uint size = data.length;
	data.length++