replace jshint with eslint

.eslintrc.json

@@ -0,0 +1,34 @@
+{
+    "env": {
+        "browser": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": 2017,
+        "ecmaFeatures": {
+            "experimentalObjectRestSpread": true
+        },
+        "sourceType": "module"
+    },
+    "rules": {
+        "indent": [
+            "error",
+            4,
+            {"SwitchCase": 1}
+        ],
+        "quotes": [
+            "error",
+            "double"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ],
+        "no-extra-semi": [
+            "off",
+            1
+        ]
+    }
+}

.jshintrc

@@ -1,3 +0,0 @@
-{
-    "esversion": 6
-}

package.json

@@ -27,10 +27,10 @@
   "author": "Geoff Doty",
   "license": "MIT",
   "devDependencies": {
+    "eslint": "^6.8.0",
     "gulp": "^4.0.2",
     "gulp-minify": "^3.1.0",
     "gulp-strip-comments": "^2.5.2",
-    "jshint": "^2.10.2",
     "tape": "^4.10.2"
   }
 }