Add ESLint and Prettier tooling

.eslintrc.json

@@ -0,0 +1,10 @@
+{
+  "extends": ["plugin:github/es6"],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["jest"],
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest/globals": true
+  }
+}

.github/main.workflow

@@ -1,11 +1,23 @@
 workflow "CI" {
   on = "push"
-  resolves = "Test"
+  resolves = ["Format", "Lint", "Test"]
 }
 
 action "Dependencies" {
   uses = "actions/[email protected]"
-  args = "ci"
+  args = "install"
+}
+
+action "Format" {
+  needs = "Dependencies"
+  uses = "actions/[email protected]"
+  args = "run format"
+}
+
+action "Lint" {
+  needs = "Dependencies"
+  uses = "actions/[email protected]"
+  args = "run lint"
 }
 
 action "Test" {

.prettierrc.json

@@ -0,0 +1,11 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid",
+  "parser": "typescript"
+}