Reference a new version of "buffer" (to be used by browserify). See b…

…rowserify/browserify#1988.

package.json

@@ -17,7 +17,7 @@
     "compile-browser-min": "tsc -p tsconfig.json && browserify out/index.js -o out-browser/erdjs.min.js --standalone erdjs -p tinyify",
     "compile": "tsc -p tsconfig.json",
     "compile-proto": "npx pbjs -t static-module -w commonjs -o src/proto/compiled.js src/proto/transaction.proto && npx pbts -o src/proto/compiled.d.ts src/proto/compiled.js",
-    "compile-browser-tests": "tsc -p tsconfig.tests.json && browserify $(find out-tests -type f -name '*.js') --exclude *.localTestnet.spec.ts --exclude *.mainnet.spec.ts -o out-browser/erdjs-tests.js --standalone erdjs-tests",
+    "compile-browser-tests": "tsc -p tsconfig.tests.json && browserify $(find out-tests -type f -name '*.js') --require buffer/:buffer --exclude *.localTestnet.spec.ts --exclude *.mainnet.spec.ts -o out-browser/erdjs-tests.js --standalone erdjs-tests",
     "pretest": "npm run compile",
     "prepublish": "npm run compile && npm run compile-browser && npm run compile-browser-min"
   },
@@ -51,6 +51,7 @@
     "@types/protobufjs": "^6.0.0",
     "assert": "^2.0.0",
     "browserify": "^17.0.0",
+    "buffer": "^6.0.3",
     "chai": "^4.2.0",
     "mocha": "^7.1.1",
     "tinyify": "^3.0.0",