Remove old Astarte client

As the last step of resolving #33, replace the old client package
with a new one, more idiomatic and simple.

Signed-off-by: Arnaldo Cesco <arnaldo.cesco@secomind.com>

Author: Annopaolo

.golangci.yml

@@ -120,7 +120,7 @@ linters-settings:
 linters:
   disable-all: true
   enable:
-    # - bodyclose # too many false positives (we close the response in Parse, but generate it in Run)
+    - bodyclose
     - dupl
     - funlen
     - gochecknoinits
@@ -134,7 +134,7 @@ linters:
     - goprintffuncname
     - gosec
     #- lll
-    # - fieldalignment # Disabled temporairly
+    # - fieldalignment # TODO: Disabled temporairly, enable it back when memory aligning fields
     - misspell
     - prealloc
     - exportloopref
@@ -173,7 +173,14 @@ issues:
     - linters:
         - gocyclo
         - funlen
+        - gocognit
       source: "^func validateType"
+      
+    - linters:
+        - gocyclo
+        - funlen
+        - gocognit
+      source: "^func validate"
 
     # We might have some unused boilerplate functions
     - linters:

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 ### Changed
 - Replace device `metadata` with `attributes`.
+- BREAKING: Remove the 0.90.1 Astarte client API and introduce a clean, idiomatic API.
+  See [#33](https://github.com/astarte-platform/astarte-go/issues/33).
 
 ## [0.90.1] - 2021-03-03
 ### Changed