Add support for all base types when importing interface from ABI

[benber86]

What I did

Importing interfaces from ABI failed with some types such as uint8.
For instance, importing the following interface:

[
    {
      "constant": true,
      "inputs": [],
      "name": "decimals",
      "outputs": [{ "name": "", "type": "uint8" }],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
  ]

Will cause an error: vyper.exceptions.StructureException: Type uint8 not supported by vyper.

How I did it

Changed supported types in ast to abi conversion in interface.py from ("int128", "uint256", "bool", "address", "bytes32") to {"address", "bool"} | BYTES_M_TYPES | INTEGER_TYPES.

How to verify it

Importing the interface from the snippet above.

Commit message

Add support for all base types when importing interface from ABI

Description for the changelog

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[codecov-commenter]

Codecov Report

Merging #3154 (5df80fc) into master (80dcf5e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #3154   +/-   ##
=======================================
  Coverage   88.49%   88.49%           
=======================================
  Files          95       95           
  Lines       10778    10779    +1     
  Branches     2268     2268           
=======================================
+ Hits         9538     9539    +1     
  Misses        797      797           
  Partials      443      443           

Impacted Files	Coverage Δ
vyper/ast/signatures/interface.py	81.81% <100.00%> (+0.33%)	⬆️

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