Gets the ith token of line, including the token in the line block declaration, if it there is
one, 0-based.
This compensates for the fact that lines in line blocks have their 0th token in the line block declaration, and makes dealing with lines more uniform.
For example, .getToken(1) will result in the dependency path (github.com/github/codeql-go)
for both lines for normal require lines like require "github.com/github/codeql-go" v1.2.3 and
in a line block like
require (
"github.com/github/codeql-go" v1.2.3
...
)
As a special case, when i is 0 and the line is in a line block, the result will be the
token from the line block.