Update issue templates

Author: arturcic

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,7 +1,7 @@
 ---
 name: Bug report
 about: Create a report to help us improve
-title: ''
+title: "[Bug]"
 labels: bug
 assignees: ''
 

.github/ISSUE_TEMPLATE/documentation.md

@@ -0,0 +1,10 @@
+---
+name: Documentation
+about: Describe this issue template's purpose here.
+title: "[Docs]"
+labels: documentation
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/failing-test.md

@@ -0,0 +1,21 @@
+---
+name: Failing test
+about: Describe this issue template's purpose here.
+title: "[Failing test]"
+labels: failing test case
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is or a link to it
+
+## Test code
+```
+using var fixture = new EmptyRepositoryFixture();
+fixture.Repository.MakeACommit();
+fixture.BranchTo("develop");
+fixture.Repository.MakeCommits(3);
+
+fixture.AssertFullSemver("0.1.0-alpha.1");
+```

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,7 +1,7 @@
 ---
 name: Feature request
 about: Suggest an idea for this project
-title: ''
+title: "[Feature]"
 labels: feature
 assignees: ''
 

.github/ISSUE_TEMPLATE/improvement-request.md

@@ -0,0 +1,21 @@
+---
+name: Improvement request
+about: Describe this issue template's purpose here.
+title: "[Improvement]"
+labels: improvement
+assignees: ''
+
+---
+
+**Is your improvement request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+## Detailed Description
+<!--- Provide a detailed description of the change or addition you are proposing -->
+
+## Context
+<!--- Why is this change important to you? How would you use it? -->
+<!--- How can it benefit other users? -->
+
+## Possible Implementation
+<!--- Not obligatory, but suggest an idea for implementing addition or change -->