api: add CRUD module support

This patch provides crud [1] methods as request objects to support CRUD API.
The following methods are supported:

* `insert`
* `insert_object`
* `insert_many`
* `insert_object_many`
* `get`
* `update`
* `delete`
* `replace`
* `replace_object`
* `replace_many`
* `replace_object_many`
* `upsert`
* `upsert_object`
* `upsert_many`
* `upsert_object_many`
* `select`
* `min`
* `max`
* `truncate`
* `len`
* `storage_info`
* `count`
* `stats`
* `unflatten_rows`

1. https://github.com/tarantool/crud

Closes #108

Author: AnaNek

CHANGELOG.md

@@ -12,6 +12,7 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 
 - Support pagination (#246)
 - A Makefile target to test with race detector (#218)
+- Support CRUD API (#108)
 
 ### Changed
 

Makefile

@@ -22,11 +22,13 @@ endif
 .PHONY: clean
 clean:
 	( cd ./queue; rm -rf .rocks )
+	( cd ./crud; rm -rf .rocks )
 	rm -f $(COVERAGE_FILE)
 
 .PHONY: deps
 deps: clean
 	( cd ./queue/testdata; $(TTCTL) rocks install queue 1.2.1 )
+	( cd ./crud; $(TTCTL) rocks install crud 0.14.1 )
 
 .PHONY: datetime-timezones
 datetime-timezones:
@@ -99,6 +101,13 @@ test-settings:
 	go clean -testcache
 	go test -tags "$(TAGS)" ./settings/ -v -p 1
 
+.PHONY: test-crud
+test-crud:
+	@echo "Running tests in crud package"
+	cd ./crud/ && tarantool -e "require('crud')"
+	go clean -testcache
+	go test -tags "$(TAGS)" ./crud/ -v -p 1
+
 .PHONY: test-main
 test-main:
 	@echo "Running tests in main package"

crud/msgpack.go

@@ -0,0 +1,10 @@
+//go:build !go_tarantool_msgpack_v5
+// +build !go_tarantool_msgpack_v5
+
+package crud
+
+import (
+	"gopkg.in/vmihailenco/msgpack.v2"
+)
+
+type encoder = msgpack.Encoder

crud/msgpack_v5.go

@@ -0,0 +1,10 @@
+//go:build go_tarantool_msgpack_v5
+// +build go_tarantool_msgpack_v5
+
+package crud
+
+import (
+	"github.com/vmihailenco/msgpack/v5"
+)
+
+type encoder = msgpack.Encoder