fix(sol-cov): make @types/solidity-parser-antlr a 'dependency' so it's available to users of the library

packages/sol-cov/package.json

@@ -48,6 +48,7 @@
         "@0xproject/typescript-typings": "^3.0.2",
         "@0xproject/utils": "^2.0.2",
         "@0xproject/web3-wrapper": "^3.0.3",
+        "@types/solidity-parser-antlr": "^0.2.0",
         "ethereum-types": "^1.0.11",
         "ethereumjs-util": "^5.1.1",
         "glob": "^7.1.2",
@@ -67,7 +68,6 @@
         "@types/mocha": "^2.2.42",
         "@types/node": "*",
         "@types/rimraf": "^2.0.2",
-        "@types/solidity-parser-antlr": "^0.2.0",
         "chai": "^4.0.1",
         "copyfiles": "^2.0.0",
         "dirty-chai": "^2.0.1",