Generate test coverage via electron with tape-istanbul

.gitignore

@@ -1,5 +1,6 @@
 node_modules/
 coverage/
+coverage.json
 tmp/
 npm-debug.log*
 .DS_Store

package.json

@@ -6,11 +6,10 @@
   "scripts": {
     "deps": "dependency-check . && dependency-check . --extra --no-dev -i xhr",
     "test:electron": "browserify tests/**/*.js -t es2020 | tape-run",
+    "test:cov": "browserify tests/**/*.js -t es2020 -p tape-istanbul/plugin | tape-run | tape-istanbul && istanbul report",
     "test:server": "standard && npm run deps && NODE_ENV=test node tests/server/*",
-    "test:server:cov": "standard && npm run deps && NODE_ENV=test istanbul cover tests/server/*",
     "test:browser": "standard && npm run deps && NODE_ENV=test zuul tests/browser/*",
     "test:browser:local": "standard && npm run deps && NODE_ENV=test zuul --local 8080 -- tests/browser/*",
-    "test:cov": "npm run test:server:cov",
     "preversion": "if [ ! -z $SKIP_TEST ]; then npm run test:browser; fi",
     "test": "npm run test:server"
   },
@@ -48,6 +47,7 @@
     "standard": "^7.1.0",
     "tachyons": "^4.0.0-beta.19",
     "tape": "^4.5.1",
+    "tape-istanbul": "~1.0.2",
     "tape-run": "~2.1.4",
     "yo-yoify": "^3.1.0",
     "zuul": "toddself/zuul"