Configure @stylistic/brace-style rule (#14)

Despite what [the docs](https://eslint.style/rules/default/brace-style)
say, `1tbs` is not the default configuration for this rule. `1tbs` is
our preferred style, so this change configures the rule thusly.

Good style:

```js
if (some_condition == other_condition) {
  console.log("hooray!");
} else if (some_condition == some_other_condition) {
  console.log("also hooray!");
} else {
  console.log("boo!");
}
```

index.js

@@ -57,6 +57,13 @@ export default [
        */
       "@stylistic/array-element-newline": ["error", "consistent"],
 
+      /**
+       * Enforce consistent brace style for blocks.
+       *
+       * @see {@link https://eslint.style/rules/default/brace-style}
+       */
+      "@stylistic/brace-style": ["error", "1tbs"],
+
       /**
        * Enforce consistent usage of line breaks between arguments of a function
        * call.

package.json

@@ -1,6 +1,6 @@
 {
   "name" :"@cargosense/eslint-config",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Shareable ESLint configuration.",
   "keywords": [
     "eslint-config",

test/index.test.js

@@ -28,6 +28,18 @@ test("loads config and invalidates incorrect syntax", async () => {
   });
 
   const expected = [
+    {
+      column: 8,
+      endColumn: 9,
+      endLine: 1,
+      fix: { range: [8, 8], text: "\n" },
+      line: 1,
+      message: "Statement inside of curly braces should be on next line.",
+      messageId: "blockSameLine",
+      nodeType: "Punctuator",
+      ruleId: "@stylistic/brace-style",
+      severity: 2,
+    },
     {
       column: 10,
       endColumn: 26,
@@ -51,6 +63,18 @@ test("loads config and invalidates incorrect syntax", async () => {
       ruleId: "array-func/prefer-flat-map",
       severity: 2,
     },
+    {
+      column: 27,
+      endColumn: 28,
+      endLine: 1,
+      fix: { range: [26, 26], text: "\n" },
+      line: 1,
+      message: "Closing curly brace should be on the same line as opening curly brace or on the line after the previous block.",
+      messageId: "singleLineClose",
+      nodeType: "Punctuator",
+      ruleId: "@stylistic/brace-style",
+      severity: 2,
+    },
     {
       column: 28,
       fix: { range: [28, 29], text: "" },
@@ -75,6 +99,6 @@ test("loads config and invalidates incorrect syntax", async () => {
     },
   ];
 
-  assert.strictEqual(errorCount, 4);
+  assert.strictEqual(errorCount, 6);
   assert.deepEqual(messages, expected);
 });