[dep][security] bump filecoin-project/merkletree, remove memmap

[jiangying000]

use maintained memmap2
address #2403

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe): dependency upgrade

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Other information

[codecov]

Codecov Report

Merging #3671 (4a88658) into master (e4cd29e) will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3671      +/-   ##
==========================================
+ Coverage   28.59%   28.67%   +0.09%     
==========================================
  Files         591      591              
  Lines       50687    50687              
  Branches    23877    23877              
==========================================
+ Hits        14490    14531      +41     
+ Misses      21978    21907      -71     
- Partials    14219    14249      +30     

Flag	Coverage Δ
unittests	28.67% <ø> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
vm/natives/src/lib.rs	80.00% <0.00%> (-10.00%)	⬇️
vm/types/src/transaction_metadata.rs	55.23% <0.00%> (-5.97%)	⬇️
config/src/helper.rs	37.26% <0.00%> (-3.92%)	⬇️
network-rpc/api/src/lib.rs	20.66% <0.00%> (-3.26%)	⬇️
commons/service-registry/src/service_actor.rs	37.64% <0.00%> (-3.22%)	⬇️
commons/accumulator/src/tree_store/mock.rs	28.58% <0.00%> (-2.85%)	⬇️
vm/types/src/token/token_value.rs	55.56% <0.00%> (-2.77%)	⬇️
commons/service-registry/src/service_ref.rs	65.76% <0.00%> (-2.73%)	⬇️
network-rpc/src/rpc.rs	19.57% <0.00%> (-2.17%)	⬇️
storage/src/db_storage/mod.rs	40.43% <0.00%> (-2.12%)	⬇️
... and 68 more

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