add symbol keys for platform/keyboard

platforms/keyboard/keyboard.go

@@ -47,6 +47,11 @@ const (
 const (
 	Escape   = 27
 	Spacebar = 32
+	Hyphen   = 45
+	Asterisk = 42
+	Plus     = 43
+	Slash    = 47
+	Dot      = 46
 )
 
 const (
@@ -91,6 +96,31 @@ func Parse(input bytes) KeyEvent {
 			event.Key = Escape
 		}
 
+		// Hyphen
+		if code == Hyphen {
+			event.Key = Hyphen
+		}
+
+		// Asterisk
+		if code == Asterisk {
+			event.Key = Asterisk
+		}
+
+		// Plus
+		if code == Plus {
+			event.Key = Plus
+		}
+
+		// Slash
+		if code == Slash {
+			event.Key = Slash
+		}
+
+		// Dot
+		if code == Dot {
+			event.Key = Dot
+		}
+
 		// number keys
 		if code >= 48 && code <= 57 {
 			event.Key = int(code)

platforms/keyboard/keyboard_test.go

@@ -14,6 +14,26 @@ func TestParseEscape(t *testing.T) {
 	gobottest.Assert(t, Parse(bytes{27, 0, 0}).Key, Escape)
 }
 
+func TestParseHyphen(t *testing.T) {
+	gobottest.Assert(t, Parse(bytes{45, 0, 0}).Key, Escape)
+}
+
+func TestParseAsterisk(t *testing.T) {
+	gobottest.Assert(t, Parse(bytes{42, 0, 0}).Key, Escape)
+}
+
+func TestParsePlus(t *testing.T) {
+	gobottest.Assert(t, Parse(bytes{43, 0, 0}).Key, Escape)
+}
+
+func TestParseSlash(t *testing.T) {
+	gobottest.Assert(t, Parse(bytes{47, 0, 0}).Key, Escape)
+}
+
+func TestParseDot(t *testing.T) {
+	gobottest.Assert(t, Parse(bytes{46, 0, 0}).Key, Escape)
+}
+
 func TestParseNotEscape(t *testing.T) {
 	gobottest.Refute(t, Parse(bytes{27, 91, 65}).Key, Escape)
 }