Merge pull request #464 from Masterminds/fix/460

Fixed #460: Fixed some ignored deps getting into lock.

dependency/resolver.go

diff --git a/dependency/resolver.go b/dependency/resolver.go
index 300ca4d..473209a 100644
--- a/dependency/resolver.go
+++ b/dependency/resolver.go
@@ -288,6 +288,9 @@
 
 		// We are only looking for dependencies in vendor. No root, cgo, etc.
 		for _, imp := range imps {
+			if r.Config.HasIgnore(imp) {
+				continue
+			}
 			if alreadySeen[imp] {
 				continue
 			}