Updated collections package to use .d.ts for external lib types

Rather than using `require` we can add a type definition file, this allows us
to add custom types in the future if we want. We need to add some config for
ts-node to pick up the types correctly.

ghost/collections/package.json

@@ -10,7 +10,7 @@
         "dev": "tsc --watch --preserveWatchOutput --sourceMap",
         "build": "tsc",
         "prepare": "tsc",
-        "test:unit": "NODE_ENV=testing c8 --src src --all --exclude 'test/' --check-coverage --100 --reporter text --reporter cobertura mocha -r ts-node/register './test/**/*.test.ts'",
+        "test:unit": "NODE_ENV=testing c8 --src src --all --check-coverage --100 --reporter text --reporter cobertura mocha -r ts-node/register './test/**/*.test.ts'",
         "test": "yarn test:types && yarn test:unit",
         "test:types": "tsc --noEmit",
         "lint:code": "eslint src/ --ext .ts --cache",

ghost/collections/src/Collection.ts

@@ -1,7 +1,7 @@
 // have to use requires until there are type definitions for these modules
 
-const {ValidationError} = require('@tryghost/errors');
+import {ValidationError} from '@tryghost/errors';
-const tpl = require('@tryghost/tpl');
+import tpl from '@tryghost/tpl';
 
 import ObjectID from 'bson-objectid';
 

ghost/collections/src/libraries.d.ts

@@ -0,0 +1,2 @@
+declare module '@tryghost/errors';
+declare module '@tryghost/tpl';

ghost/collections/tsconfig.json

@@ -1,4 +1,7 @@
 {
+  "ts-node": {
+    "files": true
+  },
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig to read more about this file */