There were several issues with the error test case that have been
addressed in this commit.
- It is possible to specify a whitelist of calls that error handling
should be ignored for.
- Additional support for ast.ExprStmt for cases where the error is
implicitly ignored.
There were several other additions to the helpers and call list in order
to support this type of functionality.
Fixes#54
- Update call list to work directly with call expression
- Add call list test cases
- Extend helpers to add GetCallInfo to resolve call name and package or
type if it's a var.
- Add test cases to ensure correct behaviour
A call list is a way of grouping a number of packages and function calls
into a blacklist or whitelist. Could be useful to exclude certain
functions from results or looking for a specific set of functions.
