review all changes since bleve fork

[mschoch]

Bluge diverged from bleve at commit 81b1327ecc52ddaec8e6b373c84297c6253feee6

[mschoch]

• [x] a929f94722d22f3a80da56a7519c4e5de1c58fa4 bump bleve versions for next bleve release (#1454)
• [x] b7678e38dcb6c73c16183c9a37ed9fb14b426c45 simplify compute geo range (#1447)
• [x] d553d2c9f1613896f411d642a2cfc4b19e42ec9c Upgrading go.mod tags for etcd-io/bbolt, RoaringBitmap/roaring (#1422)
• [x] abc1d043a690fcf392cf4b107fcb80915a58f401 Update vellum version to v1.0.2 (#1451)
• [x] 5ef9653c4e13f3ff8f48368c816752b404ac8706 fix ineffectual assignment (#1450)
• [x] 4ac551fef488287d85e7ca39bbce88de227d555e Merge pull request #1435 from sreekanth-cb/prefixCoding_fix
• [x] 9a99dfbb79795c6bd5f0dad12242d572f6dc20f4 MB-40730 - Sort by field returns incorrect results
• [x] ed463b9d02851c11c84603f30febb5a3efdc7318 MB-40962: Dropping the heuristic to skip disjunction optimizations (#1446)
• [x] 6c7808ca5341bf5fb1a17f14b3fb1bb5c3061727 Fix mishandled error within NewNumericRangeSearcher (#1445)
• [x] 3d6bf42ddd39e24e417d753d18697a5263313355 MB-40916: Do not recycle unadorned term field readers for optimized conjunctions/disjunctions (#1438)
• [x] f5339fb83361137667c2e1df635d52b3f4eca917 Fix mishandled error within IndexSnapshot's newDocIDReader
• [x] 079fce84252a18eb11cbcf5a2270ff8a38e40551 Fix the incorrect behaviour for Composite queries with Score:none (#1439)
• [x] 1f15e1d641e8ec16df952423b14bd899a3b53b06 remove TooManyClauses limitation when optimizable (#1426)
• [x] f3fe7cc2de465ba037105df7f4d756603e2bdf7c Merge pull request #1420 from itmeze/patch-2
• [x] e89c2bbb64d2f62c0948828a0cac2346dd1ed224 Merge pull request #1417 from sreekanth-cb/segment_skip_fix
• [x] 105e2b4d8b84efd20f5854f12691fed2358631be Merge pull request #1419 from sreekanth-cb/atomic_eventing
• [x] 9da414702d919c6f24afc87ce8cbf8cf91abad8b Fix for import paths in function documentation
• [x] 57aabdae99de69996720121be8cbd6b340a3e42a adding UT and minor refactoring
• [x] 1314e3722897b3939bf97cbad4140a4c6dcaf0eb Switching to atomic ops instead of locks for events
• [x] dcafaff05395de11df95fb74f7f6a75c645a1b49 fix stats handling of term field reader advancing backwards (#1416)
• [x] 4aea3d9e665c34c08d063bf956d91ada3b441ad7 MB-40007 -Obsolete segment file leaks during merge introductions
• [x] 086c3dfc284d1615e841f1f5685cdd25c14bc312 Merge pull request #1413 from abhinavdangeti/tooManyClausesErr
• [x] 25a604dd310c0d9fd57216282640237a52c5dd87 Log field name where available on tooManyClauses error
• [x] eb88a62b6dd5874ccaaf0d27a30d66d019b5bda2 Merge pull request #1400 from tylerkovacs/tyler/multisearch-sort
• [x] 2b80a2aedf6bb1746054c6771d0625866a0dcabe add support for zap v14 (#1408)
• [x] 0c90a2fc4e8ccb06077958f766135b04610adcce improve scorch config parsing of forced zap version (#1401)
• [x] 04c39ad184bb7dacaaf0dfc12357991897d14743 allow segment type/version override to work (#1407)
• [x] f830931c0ffc2c80a20e02fdad4847c7d669423e allow integration tests to force scorch segment type/ver (#1402)
• [x] 5426dde14309ecb3545ac12f62760cab0f4de126 add support for zap v13 (#1403)
• [x] c0444356976e14fb97636de3038ff86fa9351992 update datetime table test to use subtests (#1389)
• [x] a62b0bca7cfc82f26d4eb0f4b86080b8abc3f8d3 update char filter table tests to use subtests (#1388)
• [x] 9f5cdcf2c9fb65c7c7ca69087769c005fd2079c7 speed up versus test by using larger batch (#1387)
• [x] f1983f7cd7b3b0f1591ff47f9bb4b48f78493f42 rename SortImpl to SortFunc and rename getter
• [x] 5b905c99f4350d29be5a5f9c5ba5becc9aecdcf0 Add SortImpl to SearchRequest
• [x] f0ded112bb1bd6bb705ce95eff4118d520f396d6 Merge pull request #1398 from tylerkovacs/tyler/no-string-compare
• [x] e65c4bb7d3d34c785f3fb110e451576d29d8b7dc use inline comparison operators instead of strings.Compare
• [x] 7e28173364fb40038938c0ca6cdac4e5f84d742d Merge pull request #1393 from sreekanth-cb/forceMerge
• [x] 472e3e19a293a902de8cc83236419fd38881594a introducing context argument to the ForceMerge
• [x] c5a10892e327a422f169b9a81270cfcdf3d61307 introduce new scorch index builder (#1282)
• [x] 3676b426e9cbac125b84a2028072c3c03df7e79d Merge pull request #1391 from abhinavdangeti/issue1390
• [x] 1e93807deaf1fbdc77b85dde8487da86a7d7052f Adding sub-test functionality for table-driven tests
• [x] f194b0026293045dad84a48169035f3706ad415c Undo go.mod edit
• [x] 878e5f1d5187732c346bb1da6f48b7a8591e86d1 MB-38957: Add a unit test for mapping API: defaultAnalyzerName
• [x] 50532472b773525ac3606fb4529c812bf4578f5c fixing the raciness issue
• [x] 3d8737411a6785793b0ac33a3c9d0af54e3ca48e Api to trigger a force merge operation on an index
• [x] 124045f0fea96ef2f6dc2a5b1a0bd6e49691f42e Remove unintended extra lines
• [x] e2db10a90111893a597bbbe261a4bdd1fbd516e6 MB-38957: Initialize rv to dm.DefaultAnalyzer to start with
• [x] ead5428c6109e5c2abe03315f8942eb190fa2a0f MB-38957: Adding more test cases
• [x] 837a9e6e1b6a248d87e001202659ecbacc4b52bc MB-38957: Document mapping's analyzer to be inherited correctly
• [x] 4638928d99bdde25a5c75a36dfd63b4e5ce30ddd replace testidx with proper ioutil.TempDir (#1386)
• [x] 47c8c94079f2452bab91b9fc9c8a41f73af12892 Merge pull request #1385 from blevesearch/faster-tests-with-batch
• [x] 94161c7d81e5ca622d1652877ec2b407d1d04966 improve performance of query callback test
• [x] 98b3d3b5b7fac7aab20172eb438ff3e04e0cef04 improve unit test perf using batch
• [x] da259fa8610a7144c4eeecee3db6d11bad2146ae Merge pull request #1382 from blevesearch/improve-unit-test-speed
• [x] 5353f4da6d3048f47db1da17bd65d0adcf497ed3 improve unit test execution time
• [x] c3e6513aa4b80949c514032a10c506dd4cb0a726 Merge pull request #1381 from blevesearch/debug-mac
• [x] ba54e05e30587b38e10e3571ca1c2faeb846dcd8 improve reliability of test on mac
• [x] fb361a72a60251e8103e7bf8c2f01bfdb171553e update README (#1376)
• [x] b658b028ecf09c97c79e2d8d29401ba6e56b4a11 misc cleanup while reviewing chans/goroutines (#1375)
• [x] 4dc13100a7fd0120229e81450e6ed7ebcf8951fb add CI for unit tests (#1368)
• [x] dad40529ec1681dd3d1f772c5f5914a3661879b7 update to latest zap
• [x] ba61f7e8dd7c6cb82599b138cc88a94410b24956 Merge pull request #1351 from abhinavdangeti/regexp
• [x] 9d7068a670ba7aed2004d0b424b1c7374b88c91b Merge pull request #1371 from abhinavdangeti/highlightissue-1370
• [x] e94966ded5931686b1eaa9cf14b4c810e4c4b711 MB-38312: More test cases for regexp-replace
• [x] 2fc361aa497e658d8a0f9bfe1c52c6faa00a68fd MB-38312: regexp to use ReplaceAll which uses Expand
• [x] 487ec05ccabc3abad32f9d32d4a1b31aad76beee Fix slice out-of-bounds panic within highlighter

[mschoch]

Force merge broken out to separate issue #15

[mschoch]

Index builder broken out to separate issue #16