fix: update merkle-patricia-tree to v3.0.0 to support node 14

.travis.yml

@@ -1,9 +1,9 @@
 version: ~> 1.0
 language: node_js
 node_js:
-  - "8"
   - "10"
   - "12"
+  - "14.11.0"
 os:
   - linux
   - osx
@@ -33,6 +33,3 @@ before_install:
 script:
   - npm run test
   - npm run test-smoke
-
-after_success:
-  npm run coverage

README.md

@@ -1,7 +1,6 @@
 [![npm Version](https://img.shields.io/npm/v/ganache-core.svg)](https://www.npmjs.com/package/ganache-core)
 [![npm Downloads](https://img.shields.io/npm/dm/ganache-core.svg)](https://www.npmjs.com/package/ganache-core)
 [![Build Status](https://travis-ci.org/trufflesuite/ganache-core.svg?branch=master)](https://travis-ci.org/trufflesuite/ganache-core)
-[![Coverage Status](https://coveralls.io/repos/github/trufflesuite/ganache-core/badge.svg?branch=develop)](https://coveralls.io/github/trufflesuite/ganache-core?branch=develop)
 # Ganache Core
 
 This is the core code that powers the Ganache application and the Ganache command line tool.

lib/forking/forked_storage_trie.js

@@ -183,7 +183,7 @@ inherits(ForkedStorageTrie, ForkedStorageBaseTrie);
 
 function ForkedStorageTrie(db, root, options) {
   ForkedStorageBaseTrie.call(this, db, root, options);
-  checkpointInterface(this);
+  checkpointInterface.call(this, this);
 }
 
 ForkedStorageTrie.prove = MerklePatriciaTree.prove;