vendor: update liner dependency (#2700)

This change update liner to the latest release that adds support to
delete the next and the previous word with Alt-d and Alt-BackSpace
plus a small amount of fixes.

vendor/github.com/mattn/go-runewidth/runewidth_js.go

@@ -0,0 +1,8 @@
+// +build js
+
+package runewidth
+
+func IsEastAsian() bool {
+	// TODO: Implement this for the web. Detect east asian in a compatible way, and return true.
+	return false
+}