Fix: exposed multiple methods of ProtoParserTools and added unit test…

[imalygin]

Exposed multiple methods of ProtoParserTools and added unit tests for them. Also, added readNextFieldNumber method

Related issue(s):

Fixes #74

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[github-actions]

JUnit Test Report

     47 files  +    1       47 suites  +1   3m 13s ⏱️ -24s
   875 tests +112     874 ✔️ +112    1 💤 ±0  0 ❌ ±0 
5 988 runs  +175  5 970 ✔️ +175  18 💤 ±0  0 ❌ ±0 

Results for commit b4075a8. ± Comparison against base commit 0f3d84e.

♻️ This comment has been updated with latest results.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +4.73% (target: -1.00%)	✅ 74.12%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (f2933b2)	6421	1318	20.53%
Head commit (b4075a8)	6430 (+9)	1624 (+306)	25.26% (+4.73%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#137)	85	63	74.12%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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_{You may notice some variations in coverage metrics with the latest Coverage engine update. For more details, visit the documentation}

[github-actions]

Integration Test Report

     215 files  ±0       215 suites  ±0   6m 13s ⏱️ + 1m 57s
86 997 tests ±0  86 997 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
87 263 runs  ±0  87 263 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit b4075a8. ± Comparison against base commit 0f3d84e.

♻️ This comment has been updated with latest results.