bug(#237): allows SNAPSHOT only

Author: h1alexbel

src/main/resources/org/eolang/lints/metas/incorrect-version.xsl

@@ -30,7 +30,7 @@ SOFTWARE.
       <xsl:for-each select="/program/metas/meta">
         <xsl:variable name="meta-head" select="head"/>
         <xsl:variable name="meta-tail" select="tail"/>
-        <xsl:if test="$meta-head='version' and not(matches($meta-tail, '^\d+\.\d+\.\d+(-[a-zA-Z0-9-]+)?$|^\d+\.\d+(-[a-zA-Z0-9-]+)$'))">
+        <xsl:if test="$meta-head='version' and not(matches($meta-tail, '^\d+\.\d+\.\d+(-[a-zA-Z0-9-]+)?$|^\d+\.\d+-SNAPSHOT$'))">
           <xsl:element name="defect">
             <xsl:attribute name="line">
               <xsl:value-of select="eo:lineno(@line)"/>

src/test/resources/org/eolang/lints/packs/incorrect-version/catches-bad-maven-convention.yaml

@@ -23,10 +23,12 @@
 sheets:
   - /org/eolang/lints/metas/incorrect-version.xsl
 asserts:
-  - /defects[count(defect[@severity='warning'])=1]
+  - /defects[count(defect[@severity='warning'])=2]
   - /defects/defect[@line='1']
+  - /defects/defect[@line='2']
 input: |
   +version x.z-SNAPSHOT
+  +version 1.1-hello
 
   # No comments.
   [x] > foo