Added missing required keys to release software on crates.io #16

cargo test (ubuntu-20.04)

There are 0 failures, 0 warnings, and 0 notice.

Type	Count
error: internal compiler error	0
error	0
warning	0
failure-note	0
note	0
help	0

Name	Status
codec::bytes::tests::basic	ok
codec::bits::tests::big_endian	ok
codec::bits::tests::little_endian	ok
gen::rust::structure::tests::test_template_render	ok
msg	ok
msg1_2	ok
msg1_1	ok
numbers	ok
numbers_raw	ok
numbers2	ok
numbers_raw2	ok
basic	ok
run	ok
dataset	ok
flags	ok
floats	ok
master	ok
test	ok
test_offsets	ok
item_null	ok
item_string	ok
item_float	ok
item_numbers	ok