go.mod: update gitlab dep to v0.30.1

Releases after github.com/xanzy/go-gitlab@v0.31.0 introduce breaking
changes to the NewClient call.

Addresses #94

vendor/github.com/lunixbochs/vtclean/go.mod

@@ -0,0 +1 @@
+module github.com/lunixbochs/vtclean

vendor/github.com/lunixbochs/vtclean/regex.txt

@@ -1,14 +0,0 @@
-this is the source definitions for the scary escape code regex
-
-# from tests in Terminal.app, this regex should cover all basic \e[ and \e] cases
-^([\[\]]([\d\?]+)?(;[\d\?]+)*)?.
-
-# this catches any case the above does not
-# make sure to not include any special characters the main regex finds (like ?)
-\[[^a-zA-Z0-9@\?]+.
-
-# esc + paren + any single char
-[\(\)].
-
-# didn't re-check this one (not included)
-[\[K]\d+;\d+

vendor/github.com/lunixbochs/vtclean/vtclean.go

@@ -6,8 +6,13 @@ import (
 	"strconv"
 )
 
-// see regex.txt for a slightly separated version of this regex
-var vt100re = regexp.MustCompile(`^\033([\[\]]([\d\?]+)?(;[\d\?]+)*)?(.)`)
+// regex based on ECMA-48:
+// 1. optional:
+//    one of [ or ]
+//    any amount of 0x30-0x3f
+//    any amount of 0x20-0x2f
+// 3. exactly one 0x40-0x7e
+var vt100re = regexp.MustCompile(`^\033([\[\]]([0-9:;<=>\?]*)([!"#$%&'()*+,\-./]*))?([@A-Z\[\]^_\x60a-z{|}~])`)
 var vt100exc = regexp.MustCompile(`^\033(\[[^a-zA-Z0-9@\?]+|[\(\)]).`)
 
 // this is to handle the RGB escape generated by `tput initc 1 500 500 500`
@@ -21,6 +26,8 @@ func Clean(line string, color bool) string {
 	for i := 0; i < len(lineb); {
 		c := lineb[i]
 		switch c {
+		case '\r':
+			edit.MoveAbs(0)
 		case '\b':
 			edit.Move(-1)
 		case '\033':
@@ -74,7 +81,7 @@ func Clean(line string, color bool) string {
 			}
 			continue
 		default:
-			if c == '\n' || c >= ' ' {
+			if c == '\n' || c == '\t' || c >= ' ' {
 				edit.Write([]byte{c})
 			}
 		}