When the generated package name is graphql, resolvers are aliased with graphql1

The following settings are used in my gqlgen.yml file

```yml
exec:
filename: graphql/generated.go
package: graphql
```

When gqlgen is run and it modifies resolver files, the imports for the generated package are aliased to `graphql1`. There are no naming conflicts. If the aliases are removed and the references are updated to `graphql`, the application works as usual.

For example, the following import for a resolver file:

```go
import (
"context"

"github.com/brettski/brettskiql/graphql"
"github.com/brettski/brettskiql/graphql/model"
"github.com/brettski/brettskiql/transform"
)
```

Becomes this after the gqlgen generator is run:

```go
import (
"context"

graphql "github.com/brettski/brettskiql/graphql"
"github.com/brettski/brettskiql/graphql/model"
"github.com/brettski/brettskiql/transform"
)
```

Is there a way to keep the generator from making this update?

I much prefer to use the name `graphql` for my package than `graph`