Lint code.

Added a deno.json and set linting rules.  Obviously they are the
perfect rules and no one should argue with them in any fashion
ever.

deno.json

@@ -0,0 +1,10 @@
+{
+    "fmt": {
+      "lineWidth": 120,
+      "indentWidth": 4,
+      "semiColons": true,
+      "singleQuote": true,
+      "proseWrap": "preserve",
+      "include": ["src/", "test/"]
+    }
+  }