Lexer allows T-prefix on local dates

[moorereason]

Describe the Bug

The existing dateRegexp allows a T-prefix on a local date.

To Reproduce

This should not pass, but it does:

diff --git a/lexer_test.go b/lexer_test.go
index 225a52a..af12e9f 100644
--- a/lexer_test.go
+++ b/lexer_test.go
@@ -350,6 +350,12 @@ func TestKeyEqualDate(t *testing.T) {
                {Position{1, 7}, tokenDate, "1979-05-27 07:32:00Z"},
                {Position{1, 27}, tokenEOF, ""},
        })
+       testFlow(t, "foo = T07:32:00", []token{
+               {Position{1, 1}, tokenKey, "foo"},
+               {Position{1, 5}, tokenEqual, "="},
+               {Position{1, 7}, tokenLocalDate, "T07:32:00"},
+               {Position{1, 16}, tokenEOF, ""},
+       })
 }

 func TestFloatEndingWithDot(t *testing.T) {

Versions

• go-toml: 5c94d86
• go version go1.15.2 linux/amd64

[pelletier]

Thank you! Definitely not conforming to the spec.