feat: bump compiler version to v0.8.6

chore: remove superfluous field "outDir" in tsconfig.json

hardhat.config.ts

@@ -75,7 +75,7 @@ const config: HardhatUserConfig = {
     tests: "./test",
   },
   solidity: {
-    version: "0.8.6",
+    version: "0.8.7",
     settings: {
       metadata: {
         // Not including the metadata hash

tsconfig.json

@@ -6,7 +6,6 @@
     "module": "commonjs",
     "moduleResolution": "node",
     "noImplicitAny": true,
-    "outDir": "dist",
     "resolveJsonModule": true,
     "sourceMap": true,
     "strict": true,