SendInLoop Interprocedural Improvement

[Esorat]

Closes #174

• I have updated CHANGELOG.md
• I have added tests to demonstrate the contribution is correctly implemented
• No test failures were reported when running yarn test-all
• I did not do unrelated and/or undiscussed refactorings

[jubnzv]

There is also a problem in the callgraph builder. We have name collisions for methods and free functions:

fun test() {}
contract C {
  fun test() { test() }
}

Generates the following CG:

Thus, we need to fix it first, and then use the updated getFunctionName function in this lint.

[jubnzv]

We also need to update internals/ir/index.ts:

export * from "./callgraph";