refactor(medusa-interfaces): Migrate baseService to TS + improve the service it self (#1314)

* refactor(medusa-interfaces): Migrate baseService to TS + improve the service it self

* feat(medusa,medusa-interfaces): Cleanup and move base-service to medusa core

* medusa(medusa, medusa-interfaces): Improve typings

* medusa(medusa, medusa-interfaces): buildQuery make properties optionals

* feat(medusa-interfaces): Revert temporarly the medusa-interfaces while moving the base-service to the medusa core

* feat(medusa): Improve base-service typings

* feat(medusa): Remove template that is not necessary

packages/medusa-interfaces/tsconfig.json

@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "lib": ["es5", "es6"],
+    "target": "es5",
+    "outDir": "./dist",
+    "esModuleInterop": true,
+    "declaration": true,
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "sourceMap": true,
+    "noImplicitReturns": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noImplicitThis": true,
+    "allowJs": true,
+    "skipLibCheck": true,
+    "downlevelIteration": true // to use ES5 specific tooling
+  },
+  "include": ["./src/**/*", "index.d.ts"],
+  "exclude": [
+    "./dist/**/*",
+    "./src/**/__tests__",
+    "./src/**/__mocks__",
+    "node_modules"
+  ]
+}