WooCommerce Subscriptions 6.9.0

* Fix: Add missing argument number to filter for print_switch_link() - fixes PHP Warning: Missing argument 2 for WC_Subscriptions_Switcher:rint_switch_link() PR#2266
* Fix: Store decimal price values in dot separated format in the database PR#2242
* Fix: Maintain backwards compatibility by triggering woocommerce_add_order_item_meta hooks when adding line items to a subscription from checkout PR#2267
* Fix: PayPal RT: Fix rounding errors and undefined index notice PR#2216
* Fix: Fix empty needle PHP notice when empty strings are returned from WC()->countries->inc_tax_or_vat() PR#1745
* Fix: Ensure updated subscription billing and shipping names are searchable in admin subscriptions table PR#2278
* Fix: Fix PayPal Standard cancellation IPN handling after paying for a failed PayPal Standard renewal order PR#2284
* Fix: Add the billing interval to trial period expiration to fix issues with calculating Upcoming Recurring Revenue report data PR#2245
* Fix: Allow payment on a subscription's most recent order for all order types not just renewal and/or parent orders PR#2295
* Fix: Ensure switch cart items form a separate recurring cart - switch items are processed through the checkout separately so should have separate recurring carts PR#2313
* Fix: [API] Save the subscription object before updating the dates PR#2308
* Fix: Fix the including of the WCS_Report_Dashboard class to ensure it's only included once PR#2300
* Fix: Never trigger gateway renewal payment hook on a subscription with an ended status PR#2318
* Fix: Only get parent order where a parent id exists PR#2322
* Fix: Set switch order item legacy values property correctly PR#2329
* Fix: Don't throw exception when an old PayPal Standard is suspended after a switch PR#2335
* Fix: Don't duplicate download permissions by checking for pre-existing download permissions on subscription when new download files are added to a product PR#2317
* Fix: Make WCS options translatable PR#2302
* Fix: Add wcs_update_order_item_type() to fix all the order item type change issues PR#2338
* Fix: Only display/add shipping if the recurring cart needs shipping PR#2269
* Tweak: Add a link to the wcs-ipn-failures log file on the failed IPN admin notice PR#2321
* Tweak: Update subscriptions shortcode PR#2306
* Tweak: Group payment method meta in subscription billing metabox by gateway ID PR#2305
* Tweak: Disable subscription report caching after errors PR#2297
* Tweak: Permanently delete subscriptions when an order is deleted PR#2288
* Tweak: Add wcs_renewal_order_payment_update_date_created filter PR#2289
* Tweak: Update WooCommerce.com support form links PR#2291
* Tweak: Refactor WC_Subscriptions_Manager:repare_renewal() and add process_renewal() PR#2280
* Tweak: Apply Select2 to country fields on Edit Subscription screen PR#1745

* Fix: Do not save subscription product meta data on other post types, including WooCommerce Tab Manager and Jetpack post types. PR#2203
* Fix: Do not apply 'woocommerce_get_price' or 'woocommerce_product_get_price' filters to tax inclusive/exclusive prices to avoid ever applying them twice or to non price prices, like sign-up fees. Introduced in Subscriptions v2.2.5. PR#2261
* Fix: Copy custom and third-party order line item meta to cart line items during the renewal/resubscribe process so that the meta persists on the renewal/resubscribe orders and subscription. PR#2258
* Fix: Always use correct minimum variation price when generating variable price HTML, even if there is a free trial on one variation. PR#2254
* Fix: Never apply 'woocommerce_order_formatted_line_subtotal' filter twice. PR#2239
* Fix: Format plain text email for Subscription renewals correctly. PR#2255
* Tweak: Add Woo plugin header to be compatible with WooCommerce 3.1's updater. PR#2252
* Tweak: Add base composer.json for using Subscriptions with Composer. PR#2229

* Fix: Do not attempt to call WC 3.0 only method when WC 2.6 is active by fixing version check from 2.6 to 3.0. Props @lkraav. PR#2236
* Fix: Display "Limit Subscription" option on Edit Product screen even when Reviews are disabled. PR#2233
* Fix: Hide "from" price html string if all variations have identical price and billing schedule. PR#2142
* Fix: Guard against proration miscalculation in double switching within one billing period. PR#2225
* Tweak: Log old version and WooCommerce versions on update. PR#2230