Actually check TSX files with Prettier. (#159)

This makes us actually check TSX files with Prettier (until now we were only checking TS files).

It also re-runs Prettier, although apparently it fixes something in a TS file that was raising a warning, which I find very odd--since TS files were already being checked, I'm not sure how we didn't have a broken build...

lib/svg-symbol-metadata.ts

@@ -57,7 +57,10 @@ export type SvgSymbolMetadata = SvgSymbolMetadataBooleans & {
 
 export function validateSvgSymbolMetadata(
   obj: any
-): { metadata: SvgSymbolMetadata; unknownProperties: string[] } {
+): {
+  metadata: SvgSymbolMetadata;
+  unknownProperties: string[];
+} {
   const metadata: SvgSymbolMetadata = {};
   const unknownProperties: string[] = [];
   for (let key in obj) {

package.json

@@ -5,8 +5,8 @@
   "main": "index.js",
   "scripts": {
     "deploy": "npm run build && gh-pages -d dist",
-    "prettier:check": "prettier --check lib/**/*.ts lib/**/*.ts",
-    "prettier:fix": "prettier --write   lib/**/*.ts lib/**/*.ts",
+    "prettier:check": "prettier --check lib/**/*.ts lib/**/*.tsx",
+    "prettier:fix": "prettier --write   lib/**/*.ts lib/**/*.tsx",
     "typecheck": "tsc --noemit",
     "eslint": "eslint lib --ext .ts,.tsx --max-warnings 1",
     "lint": "npm run prettier:check && npm run typecheck && npm run eslint",