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/99designs/gqlgen/graphql/context_operation.go

@@ -16,10 +16,11 @@ type OperationContext struct {
 	OperationName string
 	Doc           *ast.QueryDocument
 
-	Operation            *ast.OperationDefinition
-	DisableIntrospection bool
-	Recover              RecoverFunc
-	ResolverMiddleware   FieldMiddleware
+	Operation              *ast.OperationDefinition
+	DisableIntrospection   bool
+	RecoverFunc            RecoverFunc
+	ResolverMiddleware     FieldMiddleware
+	RootResolverMiddleware RootFieldMiddleware
 
 	Stats Stats
 }
@@ -37,8 +38,11 @@ func (c *OperationContext) Validate(ctx context.Context) error {
 	if c.ResolverMiddleware == nil {
 		return errors.New("field 'ResolverMiddleware' is required")
 	}
-	if c.Recover == nil {
-		c.Recover = DefaultRecover
+	if c.RootResolverMiddleware == nil {
+		return errors.New("field 'RootResolverMiddleware' is required")
+	}
+	if c.RecoverFunc == nil {
+		c.RecoverFunc = DefaultRecover
 	}
 
 	return nil
@@ -105,3 +109,7 @@ func (c *OperationContext) Errorf(ctx context.Context, format string, args ...in
 func (c *OperationContext) Error(ctx context.Context, err error) {
 	AddError(ctx, err)
 }
+
+func (c *OperationContext) Recover(ctx context.Context, err interface{}) error {
+	return ErrorOnPath(ctx, c.RecoverFunc(ctx, err))
+}