test/test_helper.rb | 3 1 + 2 - 0 !
1 file changed, 1 insertion(+), 2 deletions(-)

 remove requirement on rubygems and no relative path in require

packable.gemspec | 2 1 + 1 - 0 !
1 file changed, 1 insertion(+), 1 deletion(-)

 remove git from gemfile

test/packing_test.rb | 5 2 + 3 - 0 !
1 file changed, 2 insertions(+), 3 deletions(-)

 bignum and fixnum are deprecated

This causes 2 warnings and 1 test failure on ruby2.7
replacing with Integer when possible
In the lastch chunk, assert_equal has been replaced by assert_match because
the generic_class_writer creates two lines of comments about encoding and
validity, which are here ignored