v0.7.0

PPTX v0.7.0

Diff since v0.6.3

Backend change: switched to ZipArchives.jl

Merged pull requests:

• Remove unzip and zip and use ZipArchives.jl instead (#31) (@nhz2)
• Add content types for picture formats (#42) (@jaakkor2)
• Refer to "[Content_Types].xml" without ".." (#43) (@jaakkor2)
• Remove content type update (#44) (@matthijscox-asml)
• Add content types, try2 (#46) (@jaakkor2)

Closed issues:

• Switch to using ZipFile.jl (#14)
• add picture with .wmf , .emf format will result corrupted pptx file while opening with M$office (#28)
• Support SVG figures (#32)
• Fixing the repair action on missing content types (#45)