fix: support java 1.5

[qxo]

2.0.x declared support java 1.5, then should be:)

[codecov-commenter]

Codecov Report

Merging #95 into master will increase coverage by 0.01%.
The diff coverage is 54.70%.

@@             Coverage Diff              @@
##             master      #95      +/-   ##
============================================
+ Coverage     39.93%   39.94%   +0.01%     
- Complexity     1493     1494       +1     
============================================
  Files           145      145              
  Lines          9490     9492       +2     
  Branches       1192     1192              
============================================
+ Hits           3790     3792       +2     
  Misses         5320     5320              
  Partials        380      380              

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/org/dom4j/io/SAXHelper.java	39.62% <ø> (ø)	5.00 <0.00> (ø)
src/main/java/org/dom4j/io/SAXReader.java	54.29% <54.29%> (+1.02%)	38.00 <38.00> (+1.00)
src/main/java/org/dom4j/DocumentHelper.java	71.83% <100.00%> (-0.54%)	23.00 <2.00> (ø)
src/main/java/org/dom4j/Namespace.java	76.19% <100.00%> (ø)	25.00 <0.00> (ø)

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[qxo]

It's should be merge into version-2.0.x branch, sorrry for the mistake