meta: move separate eslintrc files into the main one with extends rules

The reason is my IDE likes it better this way.

.eslintrc.json

@@ -3,7 +3,8 @@
   "plugins": ["@typescript-eslint", "import"],
   "extends": ["eslint:recommended", "prettier"],
   "parserOptions": {
-    "ecmaVersion": 2019
+    "ecmaVersion": 2019,
+    "sourceType": "module"
   },
   "settings": {
     "import/core-modules": ["electron"]
@@ -141,7 +142,15 @@
       }
     },
     {
-      "files": ["**/*.{spec,mock}.*", "src/**/test/*.*"],
+      "files": ["src/main/migrations/**/*"],
+      "rules": {
+        "@typescript-eslint/class-name-casing": "off",
+        "@typescript-eslint/typedef": "off",
+        "@typescript-eslint/explicit-member-accessibility": "off"
+      }
+    },
+    {
+      "files": ["**/*.{spec,mock}.*", "src/**/test/**/*"],
       "rules": {
         "no-unused-expressions": "off",
 

src/main/migrations/.eslintrc.json

@@ -1,8 +0,0 @@
-{
-  "extends": ["../../../.eslintrc.json"],
-  "rules": {
-    "@typescript-eslint/class-name-casing": "off",
-    "@typescript-eslint/typedef": "off",
-    "@typescript-eslint/explicit-member-accessibility": "off"
-  }
-}

src/renderer/.eslintrc.json

@@ -1,6 +0,0 @@
-{
-  "extends": ["../../.eslintrc.json"],
-  "parserOptions": {
-    "sourceType": "module"
-  }
-}