Migrate tests to ava + add eslint

[Amxx]

Includes:

• fuzzing values + options
• snapshot render() & dump()

[Amxx]

Note: this was copied for "openzeppelin-transpiler". Just added '@typescript-eslint/no-explicit-any': 'off', because we need explicit any (in StandardMerkleTree)

[ernestognw]

Alternatively, we can disable it only where it's used. It's only in StandardMerkleTree and we can do:

type Leaf = any[];

export interface StandardMerkleTreeData<T extends Leaf> extends MerkleTreeData<T> {
...

This way we only disable the rule in a single place. I think we can benefit of it if it works like this

[ernestognw]

Left a couple of comments but looks better than I thought

[ernestognw]

Alternatively, we can disable it only where it's used. It's only in StandardMerkleTree and we can do:

type Leaf = any[];

export interface StandardMerkleTreeData<T extends Leaf> extends MerkleTreeData<T> {
...

This way we only disable the rule in a single place. I think we can benefit of it if it works like this

[ernestognw]

Is rimraf needed? I know is widely used but reducing the surface may be a better idea.

[Amxx]

It replaces rm -rf .... I think its better for portability.

[Amxx]

Alternatively, we can disable it only where it's used. It's only in StandardMerkleTree and we can do:

type Leaf = any[];

export interface StandardMerkleTreeData extends MerkleTreeData {
...
This way we only disable the rule in a single place. I think we can benefit of it if it works like this

There are also some any in standard.test.ts and simple.test.ts
Let merge like this an possibly change that in another PR.