add -checkTypeParam flag to check type parameters

improve inferring the types of idents (fixes #12)

retract v0.6.1

Merge pull request #11 from blizzy78/dependabot/go_modules/golang.org…

…/x/tools-0.1.10

Bump golang.org/x/tools from 0.1.9 to 0.1.10

move flags code to separate files

allow -ignoreDecls to accept "const <name>" (closes #4)

This allows to ignore constant declarations.

fix linter warnings

ignore conventional Go parameters

check parameters, method receivers and named return values as well

improve README