Vendor: Updated dependencies

* Updated go.mod
 * Updated go.sum
 * Updated vendor packages

Signed-off-by: Glenn Vriesman <glenn.vriesman@gmail.com>

vendor/github.com/aws/aws-sdk-go/internal/ini/parse_stack.go

@@ -0,0 +1,60 @@
+package ini
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// ParseStack is a stack that contains a container, the stack portion,
+// and the list which is the list of ASTs that have been successfully
+// parsed.
+type ParseStack struct {
+	top       int
+	container []AST
+	list      []AST
+	index     int
+}
+
+func newParseStack(sizeContainer, sizeList int) ParseStack {
+	return ParseStack{
+		container: make([]AST, sizeContainer),
+		list:      make([]AST, sizeList),
+	}
+}
+
+// Pop will return and truncate the last container element.
+func (s *ParseStack) Pop() AST {
+	s.top--
+	return s.container[s.top]
+}
+
+// Push will add the new AST to the container
+func (s *ParseStack) Push(ast AST) {
+	s.container[s.top] = ast
+	s.top++
+}
+
+// MarkComplete will append the AST to the list of completed statements
+func (s *ParseStack) MarkComplete(ast AST) {
+	s.list[s.index] = ast
+	s.index++
+}
+
+// List will return the completed statements
+func (s ParseStack) List() []AST {
+	return s.list[:s.index]
+}
+
+// Len will return the length of the container
+func (s *ParseStack) Len() int {
+	return s.top
+}
+
+func (s ParseStack) String() string {
+	buf := bytes.Buffer{}
+	for i, node := range s.list {
+		buf.WriteString(fmt.Sprintf("%d: %v\n", i+1, node))
+	}
+
+	return buf.String()
+}