fix(core): permission problem when renmame database files on Windows

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Coverage after merging into master

85.98% ( 1368 / 1591 )

packages/core: 85.98% ( 1368 / 1591 )

File                          | Branches | Funcs    | Lines    
[lib]
cursor.js                     | 94.83%   | 95%      | 97.25%   
customUtils.js                | 0%       | 10%      | 14.04%   
datastore.js                  | 86.19%   | 95.08%   | 90.72%   
executor.js                   | 61.11%   | 75%      | 84.09%   
hashIndex.js                  | 52.50%   | 81.25%   | 55.65%   
indexes.js                    | 75%      | 85%      | 88.89%   
model.js                      | 89.10%   | 95.45%   | 95.20%   
persistence.js                | 72.57%   | 77.27%   | 89.69%   
storage.js                    | 61.29%   | 55.17%   | 71.01%