Describe the release of v1.2

Author: thewizardplusplus

CHANGE_LOG.md

@@ -6,6 +6,38 @@
 
 ## [v1.2](https://github.com/thewizardplusplus/go-code-runner/tree/v1.2) (2021-03-27)
 
+Checking of package imports used in the code written in the Go programming language.
+
+- checking of package imports used in the code written in the Go programming language:
+  - checking based on the list of allowed imports;
+- compiling of a code written in the Go programming language:
+  - checking of package imports used in the code (optionally):
+    - checking based on the list of allowed imports.
+
+### Features
+
+- saving of a code to a temporary file:
+  - storing of the temporary file with the code to an individual temporary directory;
+- checking of package imports used in the code written in the Go programming language:
+  - checking based on the list of allowed imports;
+- compiling of a code written in the Go programming language:
+  - automatic importing of the packages used in the code;
+  - checking of package imports used in the code (optionally):
+    - checking based on the list of allowed imports;
+  - enriching of an error of the external command running by an output from the stderr stream;
+- running of the compiled code (i.e. the executable file):
+  - passing of a custom input as the stdin stream;
+  - returning of an output from the stdout stream;
+  - enriching of an error of the external command running by an output from the stderr stream;
+- running of a test case set for the compiled code (i.e. the executable file):
+  - representation of a test case:
+    - input;
+    - expected output;
+  - checking of an actual output in each test case:
+    - returning of the [sentinel errors](https://dave.cheney.net/2016/04/27/dont-just-check-errors-handle-them-gracefully#sentinel%20errors):
+      - failed running — it returns on a running error;
+      - unexpected output — it returns when the expected and actual outputs do not match.
+
 ## [v1.1](https://github.com/thewizardplusplus/go-code-runner/tree/v1.1) (2021-03-27)
 
 Running of a test case set for the compiled code (i.e. the executable file).