Use object shorthand for properties (#107)

Author: LinusU

lib/coins/cbn.js

@@ -80,7 +80,7 @@ var regtest = Object.assign({}, {
 }, common)
 
 module.exports = {
-  main: main,
-  test: test,
-  regtest: regtest
+  main,
+  test,
+  regtest
 }

lib/coins/city.js

@@ -55,6 +55,6 @@ var test = Object.assign({}, {
 }, common)
 
 module.exports = {
-  main: main,
-  test: test
+  main,
+  test
 }

lib/coins/dnr.js

@@ -41,6 +41,6 @@ var test = Object.assign({}, {
 }, common)
 
 module.exports = {
-  main: main,
-  test: test
+  main,
+  test
 }

lib/coins/x42.js

@@ -53,6 +53,6 @@ var test = Object.assign({}, {
 }, common)
 
 module.exports = {
-  main: main,
-  test: test
+  main,
+  test
 }