Update solidity-parser/parser to 0.20.1 (#905)

Author: cgewecke

package.json

@@ -26,7 +26,7 @@
   "license": "ISC",
   "dependencies": {
     "@ethersproject/abi": "^5.0.9",
-    "@solidity-parser/parser": "^0.19.0",
+    "@solidity-parser/parser": "^0.20.1",
     "chalk": "^2.4.2",
     "death": "^1.1.0",
     "difflib": "^0.2.4",

yarn.lock

@@ -905,10 +905,10 @@
   dependencies:
     antlr4ts "^0.5.0-alpha.4"
 
-"@solidity-parser/parser@^0.19.0":
-  version "0.19.0"
-  resolved "https://registry.yarnpkg.com/@solidity-parser/parser/-/parser-0.19.0.tgz#37a8983b2725af9b14ff8c4a475fa0e98d773c3f"
-  integrity sha512-RV16k/qIxW/wWc+mLzV3ARyKUaMUTBy9tOLMzFhtNSKYeTAanQ3a5MudJKf/8arIFnA2L27SNjarQKmFg0w/jA==
+"@solidity-parser/parser@^0.20.1":
+  version "0.20.1"
+  resolved "https://registry.yarnpkg.com/@solidity-parser/parser/-/parser-0.20.1.tgz#88efee3e0946a4856ed10355017692db9c259ff4"
+  integrity sha512-58I2sRpzaQUN+jJmWbHfbWf9AKfzqCI8JAdFB0vbyY+u8tBRcuTt9LxzasvR0LGQpcRv97eyV7l61FQ3Ib7zVw==
 
 "@szmarczak/http-timer@^1.1.2":
   version "1.1.2"