deps: use bn.js
0.4.0
rfc3280: 0.4.0
rfc2560: 0.4.0
Properly encode IMPLICIT tag
Fix both explicit and implicit tags for submodel
rfc-3280: fix Certificate encoding
rfc3280: 0.4.1
Merge branch 'master' into use-function

Conflicts:
	test/use-test.js