feat: add spec conformance tests

.github/workflows/maven.yml

@@ -17,6 +17,8 @@ jobs:
 
     - name: Checkout repository
       uses: actions/checkout@v4.2.2
+      with:
+        submodules: 'true'
 
     - name: Set up JDK 8 and ${{ matrix.java-version }}
       uses: actions/setup-java@v4

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "purl-spec"]
+	path = purl-spec
+	url = https://github.com/package-url/purl-spec.git

pom.xml

@@ -215,6 +215,11 @@
           <artifactId>bnd-maven-plugin</artifactId>
           <version>${bnd.maven.plugin.version}</version>
         </plugin>
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>exec-maven-plugin</artifactId>
+          <version>${exec.maven.plugin.version}</version>
+        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-clean-plugin</artifactId>
@@ -597,6 +602,28 @@
       </activation>
       <build>
         <plugins>
+          <plugin>
+            <groupId>org.codehaus.mojo</groupId>
+            <artifactId>exec-maven-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>git-submodule-update</id>
+                <goals>
+                  <goal>exec</goal>
+                </goals>
+                <phase>initialize</phase>
+                <configuration>
+                  <executable>git</executable>
+                  <arguments>
+                    <argument>submodule</argument>
+                    <argument>update</argument>
+                    <argument>--init</argument>
+                    <argument>--recursive</argument>
+                  </arguments>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-enforcer-plugin</artifactId>
@@ -663,7 +690,6 @@
           <plugin>
             <groupId>org.codehaus.mojo</groupId>
             <artifactId>exec-maven-plugin</artifactId>
-            <version>${exec.maven.plugin.version}</version>
             <executions>
               <execution>
                 <id>run-benchmark</id>

src/main/java/com/github/packageurl/internal/StringUtil.java

@@ -52,6 +52,7 @@ public final class StringUtil {
         UNRESERVED_CHARS['.'] = true;
         UNRESERVED_CHARS['_'] = true;
         UNRESERVED_CHARS['~'] = true;
+        UNRESERVED_CHARS[':'] = true;
     }
 
     private StringUtil() {