Fix of Particle_swarm unit test

.gitlab/issue_templates/Bug.md

-**Summary**
+Summary
 
 (Summarize the bug encountered concisely)
 
 
-**Steps to reproduce**
+Steps to reproduce
 
 (How one can reproduce the issue - this is very important)
 
 
-**What is the current bug behavior?**
+What is the current bug behavior?
 
 (What actually happens)
 
 
-**What is the expected correct behavior?**
+What is the expected correct behavior?
 
 (What you should see instead)
 
 
-**Relevant logs and/or screenshots**
+Relevant logs and/or screenshots
 
 (Paste any relevant logs - please use code blocks (```) to format console output,
 logs, and code as it's very hard to read otherwise.)
 
 
-**Possible fixes**
+Possible fixes
 
 (If you can, link to the line of code that might be responsible for the problem)
 

.gitlab/issue_templates/Task.md

-**Summary**
+Summary
 
 (Summarize the bug encountered concisely)
 
-**Associated classes**
+Associated classes 
 
 (Classes, which need to be modified, if any)
 

src/tests/ParticleSwarm_test.cpp

@@ -24,7 +24,8 @@ BOOST_AUTO_TEST_SUITE(ParticleSwarm_test)
 
 
     BOOST_AUTO_TEST_CASE(ParticleSwarm_construction_test){
-        double domain_bound = 5;
+        std::vector<double> domain_bound;
+        domain_bound.push_back(5);
         NeuralNetwork network;
         std::vector<std::pair<std::vector<double>, std::vector<double>>> data_vec;
         std::vector<double> inp, out;
@@ -42,7 +43,8 @@ BOOST_AUTO_TEST_SUITE(ParticleSwarm_test)
     }
 
     BOOST_AUTO_TEST_CASE(ParticleSwarm_optimalize_test){
-        double domain_bound = 5;
+        std::vector<double> domain_bound;
+        domain_bound.push_back(5);
         NeuralNetwork network;
         std::vector<std::pair<std::vector<double>, std::vector<double>>> data_vec;
         std::vector<double> inp, out;