Go 1.18 package classification fix

This pulls in the latest version of gore to fix edge-cases in the
package classification logic for Go 1.18 binaries. In addition to the
update, an additional logic was added to the mod command. If the main
module path is empty, it uses the path found in the build info
structure.

Add type from offset function

This commit adds a functionality to print the type definition located at
a specific virtual address.

Add Go 1.18 support

This adds support Go 1.18 support by pulling in a newer version go gore.

Feature Moduledata

Display go.mod info if it's available in the file.

New CLI interface

Remove travis.yml

A complete rewrite of the CLI interface. The r2 commands are not hidden
when executing in standalone. This will make the commands more
discoverable. Also, the standalone commands can be executed while
running in r2 mode. The version command was updated to include compiler
version and GoRE version used. An ASCII banner was also added.

Add spaces to correct the output filename