Support Go 1.18: Upgrade gqlgen to v0.17.2 (#2443)

* Upgrade gqlgen to v0.17.2

This enables builds on Go 1.18. github.com/vektah/gqlparser is upgraded
to the newest version too.

Getting this to work is a bit of a hazzle. I had to first remove
vendoring from the repository, perform the upgrade and then re-introduce
the vendor directory. I think gqlgens analysis went wrong for some
reason on the upgrade. It would seem a clean-room installation fixed it.

* Bump project to 1.18

* Update all packages, address gqlgenc breaking changes

* Let `go mod tidy` handle the go.mod file

* Upgrade linter to 1.45.2

* Introduce v1.45.2 of the linter

The linter now correctly warns on `strings.Title` because it isn't
unicode-aware. Fix this by using the suggested fix from x/text/cases
to produce unicode-aware strings.

The mapping isn't entirely 1-1 as this new approach has a larger iface:
it spans all of unicode rather than just ASCII. It coincides for ASCII
however, so things should be largely the same.

* Ready ourselves for errchkjson and contextcheck.

* Revert dockerfile golang version changes for now

Co-authored-by: Kermie <kermie@isinthe.house>
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

vendor/github.com/magiconair/properties/lex.go

@@ -128,18 +128,6 @@ func (l *lexer) acceptRun(valid string) {
 	l.backup()
 }
 
-// acceptRunUntil consumes a run of runes up to a terminator.
-func (l *lexer) acceptRunUntil(term rune) {
-	for term != l.next() {
-	}
-	l.backup()
-}
-
-// hasText returns true if the current parsed text is not empty.
-func (l *lexer) isNotEmpty() bool {
-	return l.pos > l.start
-}
-
 // lineNumber reports which line we're on, based on the position of
 // the previous item returned by nextItem. Doing it this way
 // means we don't have to worry about peek double counting.

vendor/github.com/magiconair/properties/parser.go

@@ -59,14 +59,6 @@ func (p *parser) errorf(format string, args ...interface{}) {
 	panic(fmt.Errorf(format, args...))
 }
 
-func (p *parser) expect(expected itemType) (token item) {
-	token = p.lex.nextItem()
-	if token.typ != expected {
-		p.unexpected(token)
-	}
-	return token
-}
-
 func (p *parser) expectOneOf(expected ...itemType) (token item) {
 	token = p.lex.nextItem()
 	for _, v := range expected {
@@ -91,5 +83,4 @@ func (p *parser) recover(errp *error) {
 		}
 		*errp = e.(error)
 	}
-	return
 }

vendor/github.com/magiconair/properties/properties.go

@@ -786,7 +786,6 @@ func expand(s string, keys []string, prefix, postfix string, values map[string]s
 		}
 		s = s[:start] + new_val + s[end+1:]
 	}
-	return s, nil
 }
 
 // encode encodes a UTF-8 string to ISO-8859-1 and escapes some characters.