fix: outputted keys not in same order as input

This switches the `BTreeMap` implementation for objects out for an `IndexMap`, which means the order you write keys in is always preserved.

assets/outputs/json/boolean.json

@@ -1,4 +1,4 @@
 {
-  "bar": false,
-  "foo": true
+  "foo": true,
+  "bar": false
 }

assets/outputs/json/chained_complex.json

@@ -3,10 +3,10 @@
     "bar": {
       "baz": 42
     },
+    "qux": true,
     "quux": [
       "green eggs",
       "ham"
-    ],
-    "qux": true
+    ]
   }
 }

assets/outputs/json/compact.json

@@ -1,50 +1,50 @@
 {
+  "one": {
+    "foo": "bar",
+    "bar": "foo"
+  },
+  "two": {
+    "foo": 1,
+    "bar": 2
+  },
+  "three": {
+    "foo": 1.0,
+    "bar": 2.0
+  },
+  "four": {
+    "foo": true,
+    "bar": false
+  },
+  "five": {
+    "foo": null,
+    "bar": null
+  },
+  "six": {
+    "foo": {},
+    "bar": {}
+  },
+  "seven": {
+    "foo": [],
+    "bar": []
+  },
   "eight": [
     "foo",
     "bar"
   ],
-  "eleven": [
-    [],
-    []
-  ],
-  "five": {
-    "bar": null,
-    "foo": null
-  },
-  "four": {
-    "bar": false,
-    "foo": true
-  },
   "nine": [
     true,
     false
   ],
-  "one": {
-    "bar": "foo",
-    "foo": "bar"
-  },
-  "seven": {
-    "bar": [],
-    "foo": []
-  },
-  "six": {
-    "bar": {},
-    "foo": {}
-  },
   "ten": [
     null,
     null
   ],
-  "three": {
-    "bar": 2.0,
-    "foo": 1.0
-  },
+  "eleven": [
+    [],
+    []
+  ],
   "twelve": [
     {},
     {}
-  ],
-  "two": {
-    "bar": 2,
-    "foo": 1
-  }
+  ]
 }

assets/outputs/json/complex.json

@@ -1,12 +1,26 @@
 {
+  "name": {
+    "first": "John",
+    "last": "Smith",
+    "full": "John Smith"
+  },
   "age": 32,
+  "placeholder": null,
   "employment": {
     "employed": true,
     "name": "Postman",
     "sinceYear": 2019
   },
-  "empty1": {},
-  "empty2": [],
+  "parents": {
+    "father": {
+      "birthday": {
+        "year": 1970,
+        "month": 2,
+        "day": 3
+      }
+    }
+  },
+  "gender": "M",
   "favourites": [
     "blue",
     "fish",
@@ -15,31 +29,17 @@
     4.73753,
     false,
     {
+      "hello": "world",
       "food": {
         "favourite": "egg",
         "hated": "beef"
-      },
-      "hello": "world"
+      }
     }
   ],
-  "gender": "M",
-  "name": {
-    "first": "John",
-    "full": "John Smith",
-    "last": "Smith"
-  },
+  "empty1": {},
+  "empty2": [],
   "negative": {
-    "float": -34.34,
-    "int": -34
-  },
-  "parents": {
-    "father": {
-      "birthday": {
-        "day": 3,
-        "month": 2,
-        "year": 1970
-      }
-    }
-  },
-  "placeholder": null
+    "int": -34,
+    "float": -34.34
+  }
 }

assets/outputs/json/complex_keys.json

@@ -1,13 +1,13 @@
 {
+  "with_underscore": 0,
+  "with-dash": 1,
+  "with_🌽": 2,
   "!\"£$%^&*()_": 3,
-  "apple-pie": {
-    "crust": "yum"
-  },
+  "j12345": 4,
   "foo": {
     "bar-baz": "hello"
   },
-  "j12345": 4,
-  "with-dash": 1,
-  "with_underscore": 0,
-  "with_🌽": 2
+  "apple-pie": {
+    "crust": "yum"
+  }
 }

assets/outputs/json/float.json

@@ -1,4 +1,4 @@
 {
-  "bar": 101.0,
-  "foo": 3.14159
+  "foo": 3.14159,
+  "bar": 101.0
 }

assets/outputs/json/input.json

@@ -1,11 +1,11 @@
 {
+  "name": {
+    "first": "John",
+    "last": "Smith"
+  },
   "dob": {
     "day": 1,
     "month": 1,
     "year": 1970
-  },
-  "name": {
-    "first": "John",
-    "last": "Smith"
   }
 }

assets/outputs/json/integer.json

@@ -1,5 +1,5 @@
 {
+  "foo": 42,
   "bar": 16448250,
-  "baz": 1000000,
-  "foo": 42
+  "baz": 1000000
 }

assets/outputs/json/object_in_array.json

@@ -1,8 +1,8 @@
 {
   "foo": [
     {
-      "bar": 2,
-      "foo": 1
+      "foo": 1,
+      "bar": 2
     }
   ]
 }

assets/outputs/json/readme_example.json

@@ -1,34 +1,34 @@
 {
-  "author": {
-    "email": "mail@example.com",
-    "name": "John Smith",
-    "url": "https://example.com"
-  },
+  "name": "example-package",
+  "version": "1.0.0",
+  "main": "dist/index.js",
   "bin": {
     "filebrowser": "dist/index.js"
   },
-  "config": {
-    "hostname": null,
-    "port": 8080
+  "private": false,
+  "author": {
+    "name": "John Smith",
+    "email": "mail@example.com",
+    "url": "https://example.com"
   },
   "contributors": [
     {
-      "email": "mail@example.com",
-      "name": "John Smith"
+      "name": "John Smith",
+      "email": "mail@example.com"
     }
   ],
+  "scripts": {
+    "build": "tsc",
+    "run": "node dist"
+  },
   "dependencies": {
     "dotenv": "^8.2.0"
   },
   "devDependencies": {
     "typescript": "^4.5"
   },
-  "main": "dist/index.js",
-  "name": "example-package",
-  "private": false,
-  "scripts": {
-    "build": "tsc",
-    "run": "node dist"
-  },
-  "version": "1.0.0"
+  "config": {
+    "port": 8080,
+    "hostname": null
+  }
 }

assets/outputs/json/spread.json

@@ -1,6 +1,6 @@
 {
-  "bar": "baz",
   "hello": "world",
+  "bar": "baz",
   "nums": [
     1,
     2,

assets/outputs/json/string.json

@@ -1,6 +1,6 @@
 {
+  "foo": "bar",
   "bar": "\"\\\n\r\t",
   "baz": "a",
-  "foo": "bar",
   "qux": ""
 }

assets/outputs/json/string_interpolation.json

@@ -1,4 +1,4 @@
 {
-  "bar": "$escaped",
-  "foo": "hello, world"
+  "foo": "hello, world",
+  "bar": "$escaped"
 }