Auto merge of #83 - mrmonday:fix-deprecation, r=mrmonday
Auto merge of #83 - mrmonday:fix-deprecation, r=mrmonday

Deprecation fixes.

String::from_str() -> String::from().

libpnet/libpnet,mrmonday/libpnet,returntoreality/libpnet,little-dude/libpnet,david415/libpnet,symphorien/libpnet,little-dude/libpnet,tempbottle/libpnet,tempbottle/libpnet,tempbottle/libpnet,symphorien/libpnet,returntoreality/libpnet,mrmonday/libpnet,symphorien/libpnet,fsck/libpnet,returntoreality/libpnet,mrmonday/libpnet,tempbottle/libpnet,fsck/libpnet,david415/libpnet,fsck/libpnet,david415/libpnet,libpnet/libpnet,david415/libpnet,libpnet/libpnet,libpnet/libpnet,little-dude/libpnet,returntoreality/libpnet,symphorien/libpnet,little-dude/libpnet,fsck/libpnet,mrmonday/libpnet