Update go.mod, go.sum and vendor

Running `go mod vendor` generates new additions and deletions.

vendor/github.com/gdamore/tcell/terminfo/t/tvi970/term.go

@@ -0,0 +1,40 @@
+// Generated automatically.  DO NOT HAND-EDIT.
+
+package tvi970
+
+import "github.com/gdamore/tcell/terminfo"
+
+func init() {
+
+	// televideo 970
+	terminfo.AddTerminfo(&terminfo.Terminfo{
+		Name:         "tvi970",
+		Columns:      80,
+		Lines:        24,
+		Clear:        "\x1b[H\x1b[2J",
+		EnterCA:      "\x1b[?20l\x1b[?7h\x1b[1Q",
+		AttrOff:      "\x1b[m",
+		Underline:    "\x1b[4m",
+		PadChar:      "\x00",
+		EnterAcs:     "\x1b(B",
+		ExitAcs:      "\x1b(B",
+		SetCursor:    "\x1b[%i%p1%d;%p2%df",
+		CursorBack1:  "\b",
+		CursorUp1:    "\x1bM",
+		KeyUp:        "\x1b[A",
+		KeyDown:      "\x1b[B",
+		KeyRight:     "\x1b[C",
+		KeyLeft:      "\x1b[D",
+		KeyBackspace: "\b",
+		KeyHome:      "\x1b[H",
+		KeyF1:        "\x1b?a",
+		KeyF2:        "\x1b?b",
+		KeyF3:        "\x1b?c",
+		KeyF4:        "\x1b?d",
+		KeyF5:        "\x1b?e",
+		KeyF6:        "\x1b?f",
+		KeyF7:        "\x1b?g",
+		KeyF8:        "\x1b?h",
+		KeyF9:        "\x1b?i",
+	})
+}