Add customer methods (#2)

* Add customer interfaces and methods for creating and updating customers

Author: alinapauliina

README.md

@@ -48,16 +48,72 @@ The following api methods have been implemented:
 
 - `customers` Customers
 - `sales` Sales invoices
+- `purchases` Purchase invoices
 
 ### Getter examples
 
 Each resource type has `getAll()` and `getById(1234)` getters (below examples with customers):
 
 ```javascript
 const customers = await fennoa.customers.getAll(); // array of customers
-const customer = await fennoa.customers.getById(1234); // single customer
+const customer = await fennoa.customers.getById(1234); // single customer by id
 ```
 
+### Customer examples
+
+Get customer by customer number:
+
+```javascript
+const customer = await fennoa.customers.getByCustomerNo('1234'); // single customer by customer number
+```
+
+<br>
+Create a new customer
+
+```javascript
+const newCustomer: INewCustomer = {
+  customer_no: '1234',
+  name: 'Test Customer 2 Oy',
+  name2: 'Nimi 2',
+  address: 'Test Address 1',
+  postalcode: '00100',
+  city: 'Helsinki',
+  country_id: 'FI',
+  description: 'Test Description',
+  email: 'test@example.com',
+  phone: '0123456789',
+  fax: '0123456789',
+  website: 'https://www.example.com',
+  business_id: '1837795-7',
+  vat_number: 'FI18377957',
+  identity_number: '123456-7890',
+  account_type_id: 1,
+  contact_person: 'John Doe',
+  einvoice_address: 'einvoice@example.com',
+  einvoice_operator_id: 'OKOYFIHH',
+  sales_invoice_delivery_method: 'email',
+  customer_group_ids: [1, 2],
+  locale_id: 1,
+  locale_code: 'FI'
+};
+
+const createdCustomer = await fennoa.customers.createCustomer(newCustomer);
+```
+
+<br>
+Update a customer
+
+```javascript
+const updateCustomer: IUpdateCustomer = {
+  name: 'Updated Customer Oy'
+  customer_group_ids: [3],
+};
+
+const updatedCustomer = await fennoa.customers.updateCustomer('1234', updateCustomer);
+```
+
+<br>
+
 ### Sales examples
 
 Here is an example of creating, approving and sending a new sales invoice to a customer:

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@rantalainen/fennoa-api-client",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "",
   "main": "dist/index.js",
   "scripts": {
@@ -22,11 +22,11 @@
   },
   "homepage": "https://github.com/rantalainen/fennoa-api-client#readme",
   "devDependencies": {
-    "typescript": "^4.4.4"
+    "typescript": "^4.9.5"
   },
   "dependencies": {
-    "form-data": "^4.0.0",
-    "got": "^11.8.2"
+    "form-data": "^4.0.4",
+    "got": "^11.8.6"
   },
   "publishConfig": {
     "access": "public"