feat: stringHelpers (refs #148)

Author: tomasbjerre

src/main/java/se/bjurr/gitchangelog/api/GitChangelogApi.java

@@ -12,6 +12,7 @@
 import com.github.jknack.handlebars.Handlebars;
 import com.github.jknack.handlebars.Helper;
 import com.github.jknack.handlebars.Template;
+import com.github.jknack.handlebars.helper.StringHelpers;
 import com.github.jknack.handlebars.io.FileTemplateLoader;
 import java.io.File;
 import java.io.FileOutputStream;
@@ -62,6 +63,7 @@ private GitChangelogApi() {
     this.settings = new Settings();
     this.handlebars = new Handlebars();
     this.handlebars.setPrettyPrint(true);
+    this.handlebars.registerHelpers(StringHelpers.class);
     for (final Entry<String, Helper<?>> helper : Helpers.ALL.entrySet()) {
       this.handlebars.registerHelper(helper.getKey(), helper.getValue());
     }

src/test/java/se/bjurr/gitchangelog/api/helpers/HandlebarsHelperTest.testThatBuiltInHelperMethodsCanBeUsed.approved.txt

@@ -132,6 +132,9 @@ Has paragraphs: {{hash}}
 {{/commits}}
 
 
+## StringHelpers
+
+{{capitalizeFirst 'hello'}}
 
 ---------------------------------------------
 
@@ -681,6 +684,9 @@ This reverts commit 1edc0d71eccce51abfb5f62fdddfbe73913785f5.
 
 
 
+## StringHelpers
+
+Hello
 
 ---------------------------------------------
 

src/test/resources/templatetest/helpers/testThatBuiltInHelperMethodsCanBeUsed.mustache

@@ -130,3 +130,6 @@ Has paragraphs: {{hash}}
 {{/commits}}
 
 
+## StringHelpers
+
+{{capitalizeFirst 'hello'}}