Module depends on v1

[bvwells]

Description

This module depends on github.com/360EntSecGroup-Skylar/excelize v1 which is probably why people have reported issues with dependencies with both v1 and v2 appearing in their module files.

Steps to reproduce the issue:
Search for "github.com/360EntSecGroup-Skylar/excelize" within the code base.

Describe the results you received:
Dependencies on v1

Describe the results you expected:
Dependencies on v2 "github.com/360EntSecGroup-Skylar/excelize/v2".

Output of go version:
go version go1.12.9 windows/amd64

Excelize version or commit ID:
v2

Environment details (OS, Microsoft Excel™ version, physical, etc.):
Windows

[bvwells]

This is probably related to issues #393

[bvwells]

Thanks @xuri for accepting the fix. Happy for this to be closed now.