add version verification

[klay-ke]

No description provided.

[codecov-commenter]

Codecov Report

Merging #370 (a664002) into master (fc643c7) will decrease coverage by 0.31%.
The diff coverage is 46.34%.

@@             Coverage Diff              @@
##             master     #370      +/-   ##
============================================
- Coverage     62.76%   62.44%   -0.32%     
+ Complexity      631      630       -1     
============================================
  Files            59       60       +1     
  Lines          3024     3049      +25     
  Branches        421      424       +3     
============================================
+ Hits           1898     1904       +6     
- Misses          838      852      +14     
- Partials        288      293       +5     

Impacted Files	Coverage Δ
...h/exception/ClientServerIncompatibleException.java	0.00% <0.00%> (ø)
...vesoft/nebula/client/graph/net/ConnObjectPool.java	53.65% <ø> (ø)
...com/vesoft/nebula/client/graph/net/Connection.java	100.00% <ø> (ø)
...com/vesoft/nebula/client/graph/net/NebulaPool.java	91.00% <ø> (ø)
...va/com/vesoft/nebula/client/graph/net/Session.java	45.20% <ø> (ø)
...vesoft/nebula/client/graph/net/SessionWrapper.java	84.61% <ø> (ø)
...esoft/nebula/client/graph/net/SessionsManager.java	56.92% <ø> (ø)
...vesoft/nebula/client/graph/net/SyncConnection.java	50.87% <42.30%> (-2.59%)	⬇️
...java/com/vesoft/nebula/client/meta/MetaClient.java	57.06% <44.44%> (-0.89%)	⬇️
...ebula/client/graph/net/RoundRobinLoadBalancer.java	96.07% <100.00%> (+0.16%)	⬆️
... and 3 more

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[Nicole00]

The new exception ClientServerIncompatibleException will cause incompatible problem for user's business code.

[klay-ke]

The new exception ClientServerIncompatibleException will cause incompatible problem for user's business code.

the behavior in Java client is the same as python, since python client also throws the exception all the way up to user's

[Nicole00]

LGTM