build: move forceConsistentCasingInFileNames under compilerOptions

Try to fix the issue:
---------------------

$ make check
npm run check

> [email protected] check
> svelte-check --tsconfig ./tsconfig.json --compiler-warnings 'a11y-no-static-element-interactions:ignore,a11y-no-noninteractive-element-interactions:ignore,a11y-click-events-have-key-events:ignore'

====================================
Loading svelte-check in workspace: /home/jani/src/groovescore
Getting Svelte diagnostics...

/home/jani/src/groovescore/tsconfig.json:7:3
Error: 'forceConsistentCasingInFileNames' should be set inside the 'compilerOptions' object of the config json file

====================================
svelte-check found 1 error and 0 warnings in 1 file
make: *** [Makefile:23: check] Error 1

Problem:
--------

This brings back all warnings ignored in package.json with:

    "check": "svelte-check --tsconfig ./tsconfig.json --compiler-warnings 'a11y-no-static-element-interactions:ignore,a11y-no-noninteractive-element-interactions:ignore,a11y-click-events-have-key-events:ignore'"

tsconfig.json

@@ -1,10 +1,11 @@
 {
   "extends": "@tsconfig/svelte/tsconfig.json",
-
+  "compilerOptions": {
+    "forceConsistentCasingInFileNames": true,
+  },
   "include": ["src/**/*", "src/node_modules"],
   "exclude": ["node_modules/*", "__sapper__/*", "public/*"],
 
-  "forceConsistentCasingInFileNames": true,
   "noImplicitReturns": true,
   "strict": true,
   "noUnusedLocals": true,